Google Ads Unit

Wednesday, November 15, 2006

Google Adsense FAQ



How do I get unbanned?

What is a channel?

I clicked a bunch of ads on the first day, and I didn't know. What do I do?

Google Adsense ads (and AdLinks) are using italic text. How do I make them look normal?

I got some English text on my site, but it's mostly *Insert other language.* Why do I mostly get PSAs?

Are AdSense Trackers OK to use?

How can I view my ads with out clicking them?

Should I be worried about all the accounts disabled for invalid clicks reports?

Will I get terminated for not generating enough clicks or impressions?

Can Adsense be in pop-ups?

Can I have AdSense placed in a newsletter (online) that is accessed by a link in an email to a sites newsletter subscribers?

Some times I get a message that says 'Page could not be found' with a 404 error, where the link units should be. What do I do?

Everyday, my 'aggregate' clicks are about 15% more than the sum of all my channel clicks. Why do I have missing clicks?

Is it OK to create an Adsense Search Engine, ie direct users to a particular keyword?

Can we have images above or next to our ads?

My Adsense ads stopped showing up on some of his pages, and then stopped showing up altogether. Why?

What are CPC ads versus CPM ads?

Can we view CPM ads on our own site?

Will AdSense effect my Google listings?

What do I do if I'm about to get bombed with visitors?

What is the life of a Payment?

Can I sign-up if I'm under 18?

Do I need to contact Google every time I make a new web site?

How do I use section targeting to emphasize or downplay when matching ads to my site's content?

Why don't I see any change in ads after using section targeting?

Can Amazon ads be on the same page as Google ads?

Can affiliate text links be on the same page as AdSense?

Are there animated ads in Google?

Can I add ads with in posts of vBulletin or phpBB?

Can I have Google ads in E-Mail?

Is AdSense allowed on pure commercial sites?

Is there any way to see what ads my visitors are clicking?

How many Channels can I have?

Why can't I log in now?

Can I check my AdSense stats on a Cell Phone?

So I was clicking my own ads, and now my account has been disabled. What do I do to get back in?

Can I place Yahoo and Google ads on the same site?

Who pays more, Google or Yahoo?

Is it OK to tell visitors to click non-Adsense ads on a site with AdSense Ads?

How can I be making money from no clicks?

How do I report a cheater?

How do I get my ads up there with AdSense Ads?

What are the rules about having images next to ads?

Do they tell you when they send a check out?

Is it OK to insert Adsense after the first post in forums?

I've been denied twice from joining. WHY?

What if I get denied when I sign-up and Google says I got banned before, yet I've never used AdSense?

Are Adsense stats a good source to check your traffic?

How do I add AdSense to my feeds?

Can I change the colors?

OMG my CTR is way up, Google must be doing something! Am I going to get banned?

OMG my CTR and eCPM is way down, Google must be cutting payouts for everyone, who else is seeing the same thing?

How much can I earn?

How long does it take to start earning money?

When do I get paid?

Why can't I sign-up for EFT?

Other people are getting the Payment In Progress message but I'm not. What's up with that???

I didn't get my check. Can I be reissued a check?

I didn't get my PIN.

How do I change my payee information?

What do I do if my EFT payment fails?

Do I have to pay taxes on the money I earn?

Are my stats reflected in real time?

Does high CTR mean elimination from Adsense?

What is a good CTR?

Why does the page eCPM goes down as day progresses?

CTR over 100% - what's up with that?

I clicked my own Ads by mistake!

How do I keep from getting terminated?

How many ads can I place on one page?

Can my account be reinstated after being disabled for invalid activity?

Can I display ads on search results pages?

Can I sign up for more than one account?

How do I beta test AdSense for feeds?

How do I change my email address / login?

Why am I getting PSAs?

Why are ads not appearing on my site?

I tried joining a week ago but I haven't got any reply. What do I do?

Why are my high paying ads getting so low EPC?

Can somebody sabotage my account?

What are highest paying keywords?

I have placed Adsense in my site for X months, but I have only made $X.00. How can I make more money?

It looks like every one is getting banned. Why should I even join?

Should I make AdSense only sites?

Is it possible to filter keywords or general topics from your ads?

Is a high PR required to get high paying ads?

Links

Go Here : http://www.webmaster-headquarters.com/faqs/adsense.shtml 

How To Sumit Your Site ?

- Google : http://www.google.com/addurl/

Share your place on the net with us.

We add and update new sites to our index each time we crawl the web, and we invite you to submit your URL here. We do not add all submitted URLs to our index, and we cannot make any predictions or guarantees about when or if they will appear.

Please enter your full URL, including the http:// prefix. For example: http://www.google.com/. You may also add comments or keywords that describe the content of your page. These are used only for our information and do not affect how your page is indexed or used by Google.

Please note: Only the top-level page from a host is necessary; you do not need to submit each individual page. Our crawler, Googlebot, will be able to find the rest. Google updates its index on a regular basis, so updated or outdated link submissions are not necessary. Dead links will 'fade out' of our index on our next crawl when we update our entire index.

-Yahoo : http://submit.search.yahoo.com

-MSN : http://submitit.bcentral.com/msnsubmit.htm
To be considered for inclusion in the Inktomi Search Index, powering the MSN Web Pages section:
Your site must be in English.
Your site cannot contain pornography, pornographic or adult advertising, gratuitous or graphic violence, material that infringes on or violates someone's rights, or material that promotes/disseminates illegal activities.
Your site cannot mirror or redirect to another Web site.

There are no guarantees on acceptance or turnaround time for these submissions.

-Searchenginez : http://searchenginez.com/submit.html
- More :

Search : Keyword : Submit, More Traffic....
http://yahoo.com
http://google.com
http://msn.com






Googel Adsense - Wikipedia

AdSense is an ad serving program run by Google. Website owners can enroll in this program to enable text, image and, more recently, video advertisements on their sites. These ads are administered by Google and generate revenue on either a per-click or per-thousand-impressions basis. Google is also currently beta-testing a cost-per-action based service.

Google utilizes its search technology to serve ads based on website content, the user's geographical location, and other factors. Those wanting to advertise with Google's targeted ad system may sign up through AdWords. AdSense has become a popular method of placing advertising on a website because the ads are less intrusive than most banners, and the content of the ads is often relevant to the website.

It currently uses JavaScript code to incorporate the advertisements into a participating site. If it is included on a site which has not yet been crawled by the Mediabot, it will temporarily display advertisements for charitable causes known as public service announcements (PSAs). (Note that the Mediabot is a separate crawler from the Googlebot that maintains Google's search index.)

Many sites use AdSense to monetize their content and some webmasters work hard to maximize their own AdSense income. They do this in three ways:

They use a wide range of traffic generating techniques including but not limited to online advertising.

They build valuable content on their sites; content which attracts AdSense ads and which pay out the most when they get clicked.

They use copy on their websites that encourage clicks on ads. Note that Google prohibits people from using phrases like "Click on my AdSense ads" to increase click rates. Phrases accepted are "Sponsored Links" and "Advertisements".



The source of all AdSense income is the AdWords program which in turn has a complex pricing model based on a Vickrey second price auction, in that it commands an advertiser to submit a sealed bid (not observable by competitors). Additionally, for any given click received, advertisers only pay one bid increment above the second-highest bid.Contents [hide]

1 AdSense for feeds

2 AdSense for search

3 How AdSense works

4 Abuse

5 Criticism

6 See also

7 References

8 External links







AdSense for feeds

In May 2005, Google unveiled AdSense for feeds, a version of AdSense that runs on RSS and Atom feeds that have more than 100 active subscribers. According to the Official Google Blog, "advertisers have their ads placed in the most appropriate feed articles; publishers are paid for their original content; readers see relevant advertising — and in the long run, more quality feeds to choose from".


AdSense for feeds works by inserting images into a feed. When the image is displayed by the reader/browser, Google writes the ad content into the image that it returns. The ad content is chosen based on the content of the feed surrounding the image. When the user clicks the image, he or she is redirected to the advertiser's site in the same way as regular AdSense ads.



AdSense for search

A companion to the regular AdSense program, AdSense for search lets website owners place Google search boxes on their pages. When a user searches the web or the site with the search box, Google shares any ad revenue it makes from those searches with the site owner. However, only if the ads on the page are clicked, the publisher is paid. Adsense does not pay publishers for mere searches.



How AdSense works

Each time a visitor visits a page with an AdSense tag, a piece of JavaScript writes an iframe tag, whose src attribute includes the URL of the page. Google's servers use a cache of the page for the URL or the keywords in the URL itself to determine a set of high-value keywords. (Some of the details are described in the AdSense patent.) If keywords have been cached already, ads are served for those keywords based on the AdWords bidding system.



Abuse

Some webmasters create sites tailored to lure searchers from Google and other engines onto their AdSense to make money from clicks. These "zombie" sites often contain nothing but a large amount of interconnected, automated content (e.g. a directory with content from the Open Directory Project). Possibly the most popular form of such "AdSense farms" are splogs ("spam blogs"), which are centered around known high-paying keywords. Also many sites use free content from other web sites, such as Wikipedia, to attract visitors. These and related approaches are considered to be search engine spam and can be reported to Google.

There have also been reports of Trojans engineered to produce fake Google ads that are formatted to look like legitimate ones. The Trojan Horse apparently downloads itself onto an unsuspecting computer through a web page and then replaces the original ads with its own set of malicious ads.



Criticism



Due to concerns about click fraud, Google AdSense has been criticized by some SEO firms as a large source of what Google calls "invalid clicks". Some disabled publishers have complained that the process is not transparent or accountable.

To help prevent click fraud, publishers can choose from a number of click tracking programs. These programs will display detailed information about the visitors who click on the AdSense pages. Publishers can use that data to determine if they've been a victim of click fraud or not. There seems to be many such commercial scripts available. An open-source alternative is AdLogger.

Google has also come under fire for not doing enough to combat the misuse of trademarks. Since 2004, Google had stopped prohibiting advertisers from bidding on any keyword, including trademarked terms

 

Learn More In Google Adsense

Effective CPM
Cost per 1000 impressions. From a publisher's perspective, CPM is a useful way to compare revenue across different channels and advertising programs. It is calculated by dividing total earnings by the number of impressions in thousands. For example, if a publisher earned $180 from 45,000 impressions, the CPM would equal $180/45, or $4.00. However, please keep in mind that eCPM is a reporting feature that does not represent the actual amount paid to a publisher.


What is a conversion in my referral reports?

A conversion is reported when one of your referrals reaches the threshold required for you to generate earnings. This will vary depending on the type of product you're referring:

Firefox plus Google Toolbar: a conversion occurs when a user downloads Firefox through your referral button and runs it for the first time. Your referral must be a Windows user, who has not previously installed Firefox, in order for you to receive credit.

AdSense: a conversion for AdSense is counted when a user you've referred to AdSense has signed up and earned their first $100 within 180 days.

AdWords: a conversion occurs when a user signs up for AdWords through your referral button or link and spends $100 within 90 days.

Pack: we count a conversion when a Windows user, who has not previously downloaded Pack or the components of Pack, downloads and installs the product for the first time after being referred through your button.

Picasa: a conversion takes place for Picasa when a Windows user, referred through your referral link, downloads and installs Picasa for the first time.

Please note that in order for your referral to be successful and result in a conversion, the user you refer must sign up directly through your referral button or link. If the user you've referred does not sign up or download a product directly through your referral button, we will be unable to track the referral and you will not receive credit.

Because not all referred publishers who sign up for AdSense or AdWords will reach $100 in earnings within the given time limit, you may notice that the amount of sign-ups is higher than the amount of conversions. Depending on the success of your referrals, these statistics may even out over time.


Payment Guide
https://google.com/adsense/support/bin/answer.py?answer=21591&sourceid=aso&subid=ww-ww-et-asui&medium=link
 



Some Step You Want To Know

The Steps

The ten basic steps to creating a successful money-making web site are shown in the diagram. Each step is essential in the process of bringing a site from its inception to the point at which it becomes a reliable source of income.

Most of the steps are part of the development process for any web site, but if a site is intended to make money, special consideration and a couple of additional steps are required.

We'll discuss the steps in separate articles as this site develops but first, some explanation of basics.


Create site - Select the right site subject and format for best money-making potential.

Submit and link - Make search engines aware of your site.

Crawled - Make search engines visit your site and become familiar with it.

Indexed - Get your site into search engine listings.

Ranked - Get ranked high in search engine results.

Visited - With good search engine listings, attract the right kind of visitors.

SEO - Search engine optimization and promotion, the two keys to maximizing traffic.

Monitize - Setting your site up to make money. Choose the best method.

SRO - Site revenue optimization, the key to maximizing revenue.

Revenue - Get paid for all your effort.

 

You should read carefully before Join Googel Adsense

Make Money with Adsense

Those who desire to make money on the web ultimately find themselves looking at Google Adsense as one of the most promising methods of quickly seeing results.

Simply place ads on your website, hope that your visitors click on them, and watch your mailbox for your monthly check. It's not quite that easy, however.

Following are some essential guidelines and tips to help you make your Adsense monitized site succeed.

1) Read the description of the Adsense program and apply for an account using the link on the description page. You must have at least one web site. Once you are accepted, you can place ads on any other web sites you own without separate application.

2) Read the Adsense Terms and Conditions. These are the rules you must play by. The rules are sometimes referred to as Adsense TOS (Terms of Service) but this is erroneous. Google's TOS are for use of it's search engine, not for Adsense. We'll highlight some of the most important T&Cs here. The penalty for not playing by the rules can be serious — being permanently banned from the program — forever.

3) Read the Adsense Program Policies. These, along with the Terms and Conditions, are your rulebook for being successful making money with Adsense. If you have questions regarding the rules ask someone on one of the webmaster discussion forums, or send an email to Google.

4) Never modify the HTML code that Google provides you to insert in your web pages.

5) Never, ever, click on your own ads — or ask friends and relatives to do it for you. Google considers this a form of click fraud and you risk being banned. the odds are against you if this happens, even if it happens accidentally.

6) Never try in any way to artificially intice your site visitors to click on your ads. Don't ask them to click, don't suggest that they click, don't trick them into clicking. Don't place your ad units near other page elements, such as graphics, that might make your visitors think the two are related.

7) Don't label your ads with anything but "sponsored links" or "advertisements" — or use no label at all. Do not place the ads in the proximity of labels or a graphic image that might appear to be a label for an ad block.

5) Place ads on pages with genuine content, not links, graphics, or empty pages. Google uses the content to determine which ads to display on your page. If you've done a good job with content, and Google has an inventory of ads that are relevant to that content, you're doing well.

6) Don't create MFA (Made For Adsense) sites or pages. Don't waste your time or money on purchasing MFA sites, high-paying keyword lists, or ebooks promising secrets to creating such sites.

7) Text ads generally do better than image ads, but it can depend on the site.

8) Large ad blocks (336x280) generally do better than other formats, especially when integrated into content areas of a page. Use only one block for small content areas, two or three for large articles and content areas.

9) Place your ads as close as possible to the area of your page where you expect your visitors to focus their attention. A tall skyscraper ad on the right side of a page with most of the content on the left will not do well.

10) Don't overcrowd a page with ads. No back-to-back ad blocks. It doesn't look good and it annoys your visitors. If you use multiple ad blocks, be aware that the first ads that Google finds in your HTML code will be the ads with the highest earnings-per-click. For example, if you have a block hidden at the top of your page, and another more inviting block down in your content, you won't get the highest paying clicks.

11) Ads that use your page background color and no borders will work best for most sites. However, for some types of sites such as forums and blogs, it's very difficult to blend and integrate ad blocks into content areas. For these types of sites, it may be necessary to use some contrasting ad colors and borders to get the attention of your visitors. Changing colors and borders from time to time will also help prevent ad-blindness for regular returning visitors.

12) Ad units generally work better than link units. Reasons: a) Link units are small and often difficult to see, b) Visitor has to click twice to get to advertiser's web site (more work), and c) earnings are generally lower, even though CTR may be higher (large number of ad choices for visitor but lower revenue per click).

13) If your site makes money in ways other than Adsense (e.g. you sell an ebook), be aware that your Adsense ads may carry your visitors away from your site before they have a chance to spend money with you. Don't count on them clicking the 'Back' button to return to your site. Therefore, you'll have to compromise in your ad placements. Also use Filters to block out ads from direct competitors.

14) Make sure your page titles and content allow Google to easily determine what your site or page is about -- in order to create relevant ads. Forums and blogs are often problems in this respect because of the wide variety of topics in the content.

15) Use Adsense 'section targeting' to suggest to Google which areas of your page you consider most important. This helps Google to display the most relevant ads for you. Although this might not always get the results you want, it's worth a try, especially if you are having a problem with poor ad relevancy.



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Estimate your Adsense earnings with the Adsense Calculator.

 https://www.google.com/adsense/afc-online-overview
 https://www.google.com/adsense/localized-terms?hl=en_US
 https://www.google.com/adsense/policies
 http://www.stackpoint.com/adsense_calculator

Google Adsense Program Policies

Google AdSense Program Policies

To uphold the quality and reputation of Google AdSense, all publishers who apply are reviewed according to these program policies.

You may notice that some policies are only relevant to publishers who have elected to receive certain Google services. For example, references to "search box" only apply to publishers who have elected to receive Google search services, and policies regarding the placement of Google ads on a site are only relevant to publishers who have elected to receive contextual ads. Please read the policies carefully and assume that they all apply to you, unless the specific policy explicitly states otherwise.

Please note that we may change our policies at any time, and pursuant to our Terms and Conditions, it is your responsibility to keep up-to-date with and adhere to the policies posted here.


Account Transferability


AdSense accounts are not transferable, assignable or resalable in connection with the sale of your site or otherwise. For example, when a site changes ownership or management, the prior owner or manager must cancel the AdSense account for the site, and the new owner or manager may sign up for a new AdSense account in his or her own name.

Ad Placement

Up to three ad units may be displayed on each Web site page.
A maximum of two Google AdSense for search boxes may be placed on a page.
A single link unit may be placed on each Web site page, in addition to the ad units and search boxes specified above. Link units are considered to be 'Google ads' for purposes of these program policies.

A single referral button per product may be placed on a page up to a maximum of 4 buttons, in addition to the ad units, search boxes, and link units specified above. Referral buttons are considered to be ‘Google ads’ for purposes of these program policies.

No Google ad may be placed on any non-content-based pages.

No Google ad or Google search box may be displayed on any domain parking websites, pop-ups, pop-unders, or in any email.

No Google ad may be placed on pages published specifically for the purpose of showing ads, whether or not the page content is relevant.

Elements on a page must not obscure any portion of the ads, and the ad colors must be such that any ad elements, including text and URL, are visible.

Clicks on Google ads must not result in a new browser window being launched.


Alternate Ads


If you have elected to receive contextually-targeted ads, you can make sure that your advertising space is always being used effectively, either by targeted Google ads, or by your own choice of content by specifying an image or ad server of your choice. However, you may not specify Google ads as your alternate ads.

Client Software

A site or third party cannot display our ads, search box, search results, or referral buttons as a result of the actions of any software application such as a toolbar. No Google ad, search box, or referral code may be pasted into any software application. Web pages displaying our ads, search box, search results, or referral buttons may not be loaded by any software that can trigger pop-ups, redirect users to unwanted websites, modify browser settings, or otherwise interfere with site navigation. It is your responsibility to ensure that no ad network or affiliate uses such methods to direct traffic to pages that contain your AdSense code. Accounts involved in this type of activity may be permanently disabled.

Code Modification

Any AdSense ad code, search box code, or referral code must be pasted directly into Web pages without modification. AdSense participants are not allowed to alter any portion of the ad code or change the layout, behavior, targeting, or delivery of ads for any reason.

Competitive Ads and Services

We do not permit Google ads or search boxes accessing Google search services to be published on web pages that also contain what could be considered competing ads or services. If you have elected to receive contextually-targeted Google ads, this would include all other contextually-targeted ads or links on the same page as Google ads. This would also include ads throughout the site that mimic Google ads or otherwise appear to be associated with Google on your site. Although you may sell ads directly on your site, it is your responsibility to ensure these ads do not mimic Google ads. If you have elected to receive Google search services, this would include other search services on the same site and non-Google query-targeted ads. We do allow affiliate or limited-text links.


Copyrighted Material


In order to avoid associations with copyright claims, website publishers may not display Google ads on web pages with MP3, Video, News Groups, and Image Results.


Dialers


Your site must not require or prompt an end user to download a dialer in order to view content of the site.


Incentives


Web pages may not include incentives of any kind for users to click on ads. This includes encouraging users to click on the ads or to visit the advertisers' sites as well as drawing any undue attention to the ads. For example, your site cannot contain phrases such as "click here," "support us," "visit these links," or other similar language that could apply to any ad, regardless of content. These activities are strictly prohibited in order to avoid potential inflation of advertiser costs. In addition, publishers may not bring unnatural attention to sites displaying ads or referral buttons through unsolicited mass emails or unwanted advertisements on third-party websites. Publishers are also not permitted to use deceptive or unnatural means to draw attention to or incite clicks on referral buttons.


Labeling Ads


Publishers may not label the ads with text other than "sponsored links" or "advertisements." This includes any text directly above our ads that could be confused with, or attempt to be associated with Google ads.


Language


The AdSense ad code for contextually-targeted ads may be placed on pages with content primarily in any of our supported languages. Ads must not be displayed on any page with content primarily in an unsupported language.


Prohibited Clicks and Impressions


Any method that artificially generates clicks or impressions is strictly prohibited. These prohibited methods include but are not limited to: repeated manual clicks or impressions, incentives to click or to generate impressions, using robots, automated click and impression generating tools, third-party services that generate clicks or impressions such as paid-to-click, paid-to-surf, autosurf, and click-exchange programs, or any deceptive software. Please note that clicking on your own ads for any reason is prohibited, to avoid potential inflation of advertiser costs.


Site Content


Site may not include:

1. Excessive profanity

2. Violence, racial intolerance, or advocate against any individual, group, or organization

3. Hacking/cracking content

4. Illicit drugs and drug paraphernalia

5. Pornography, adult, or mature content

6. Gambling or casino-related content

7. Excessive advertising

8. Any other content that promotes illegal activity or infringes on the legal rights of others

9. Pop-ups, pop-unders or exit windows that interfere with site navigation, obscure Google ads, change user preferences, or are for downloads. Other types of pop-ups, pop-unders, or exit windows may be allowed, provided that they do not exceed a combined total of 5 per user session

10. Excessive, repetitive, or irrelevant keywords in the content or code of web page10.s

11. Deceptive or manipulative content or construction to improve your site's search engine ranking, e.g., your site's PageRank

12. Incentives (monetary or point-based) to users or third-party beneficiaries for online activity including, but not limited to, clicking on ads or links, performing searches, surfing websites, reading emails, or completing surveys

13. Sales or promotion of certain weapons, such as firearms, ammunition, balisongs, butterfly knives, and brass knuckles

14. Sales or promotion of beer or hard alcohol

15. Sales or promotion of tobacco or tobacco-related products

16. Sales or promotion of prescription drugs

17. Sales or promotion of products that are replicas or imitations of designer goods


Site Functionality

Your site must not contain broken links and must be launched, functioning, and easily navigable.


Site Responsiveness

Sites must respond adequately to support requests and enquiries of their users.


Webmaster Guidelines


In addition to the standards above, AdSense participants are required to adhere to the webmaster guidelines posted at http://www.google.com/webmasters/guidelines.html. Some relevant items from the guidelines are included below for your reference:

Do not load pages with irrelevant or excessive key words.

Do not employ cloaking or sneaky redirects.

Do not create multiple pages, subdomains, or domains with substantially duplicate content.

Avoid hidden text or hidden links.

Keep the links on a given page to a reasonable number (fewer than 100).

Do not participate in link schemes designed to increase your site's ranking or PageRank. In particular, avoid links to web spammers or "bad neighborhoods" on the web as your website may be affected adversely by those links.

 

Adsense Basic

What is Google Adsense ?

Google AdSense is a fast and easy way for website publishers of all sizes to display relevant Google ads on their website's content pages and earn money. Because the ads are related to what your visitors are looking for on your site — or matched to the characteristics and interests of the visitors your content attracts — you'll finally have a way to both monetize and enhance your content pages.

It's also a way for website publishers to provide Google web and site search to their visitors, and to earn money by displaying Google ads on the search results pages.


Which site should I publish to join Google Adsense ?

Come Here : http://toppayingkeyword.blogspot.com


How To Join Google Adsense And Begin Make Money With Google Adsense ?

1. Create a good blog or website in few days. Blog content must be good, you will be accepted.
2. Visit http://toppayingkeyword.blogspot.com, you can see where to join.
3. Click "Join Google Adsense Now" And Step by Step fill where is needed.


I've been denied twice from joining. WHY ?


Content! Content! Content! And read the TOS. For example, if the site is about firearms, xxx, gambling, or warez, even if it's just for example firearms reviews, that might set off the deny button. In short, (List made by alang)....

1. Site under construction.
2. Not enough pages.
3. Not enough traffic.
4. Site that doesn't comply with policy.

Don't give up. Many people have had to sign up a few times before getting accepted. And try to get a good PR!