Google's system has not yet crawled all the pages of your website.
- The crawler needs more time. If Google has not previously crawled your site, it may take up to 48 hours or more to gather the content of that page. In the meantime, the ads you see may be public service ads or ads that are only slightly relevant. The relevance will increase over time.
Note: Cawler indexes by URL and therefore considers http://site.com and http://www.site.com different URLs. Because it will visit these URLs separately, you may notice ads appear differently on these pages.
- The crawler can't reach your site. If the crawler isn't able to access your page, you will see an error message on the Site Diagnostics page of your account. For more details on these errors and how to resolve them, please go here: Site Diagnostics entry.

Your page may contain sensitive content for which relevant paying ads will not be displayed.
Google system has certain filters in place to protect the advertisers from advertising on pages that could be construed as potentially negative, non-family safe or even offensive. Although the nature of your content may not fit into any of these categories, at times the emphasis of some sensitive subject matters on a page can flag the servers to deliver public service ads to a page.

• If you see a message stating: Account Not Active: An AdSense account does not exist for this login, as it is associated with an unapproved application., search your email to find the disapproval or account closure message for more information.
• If you've applied to AdSense through another website, such as Blogger, you may be displaying ads even though your application is unreviewed or has been disapproved.
  • If you see a message stating Account Not Active: An AdSense account does not exist for this login, as your application is currently in review., please wait 2-3 days because your application is under review.
    
  • If you see another message or form, search your email to find the disapproval message for more information.
• If you successfully log into your account, this reason doesn't apply to you.
  

Your site has restricted access using a robots.txt exclusion.
If your site is using a robots.txt file, the AdSense crawler may be blocked from crawling your webpages. Therefore, your site can't get the most relevant ads based on the content of your website. On pages the crawler unable to crawl or understand the content of a page, public service ads may be displayed, for which you will not receive any earnings.

For more information on the robots protocol, please visit http://www.robotstxt.org.

Your website is using session IDs in the URL.
If your webpages use session IDs, you may not receive targeted ads on those pages. Since this session ID - and therefore the URL - changes every time a different user views a page, the URL will not be in the index and will be queued to be crawled. Once the URL is crawled, however, the session will most likely have expired. This means that pages seen by the users are never in the index. You will need to remove the session IDs in order to display targeted ads.

Your website is using frames.
Google AdSense crawlers are unable to match ads to your webpage content when the AdSense ad code is placed in a frame separate from the primary content of your website. It is important to place the ad code in the same frame as the content of your webpages in order to serve ads targeted to your webpage content.

Your ad unit is set to display image ads only.
Image ad inventory for your content may be limited at this time; PSAs will be displayed in that unit when there are no relevant image ads available. To avoid showing PSA's, please update your preferences to show both text and image ads or implementing an alternate ad.

Your webpage may not contain enough content.
There may not be enough information on your site for Adsense crawlers to determine the content of your pages. Therefore, it is a bit difficulty to identify relevant ads to show on your pages. Please note that the crawlers are unable to derive meaning from:

* audio and video files (.wma, .mpeg, .mov)
* mp3 files (.mp3)
* images (.jpeg, .bmp)
* Macromedia Flash movies
* Java Applets

In such cases, you need to include more content other than the above files on your website to assist the crawlers in gathering information about your site to display relevant ads.

The AdSense ad code was placed within an IFRAME.

Your webpages are behind a login.
At this time, pages that require a login can not be easily visited by Adsense crawlers. Additionally, since these types of pages are not easily visited for approval and it is difficult for AdSense specialists to verify that pages behind a log in follow Google AdSense policies.

There are too many URLs added to your account filter list.
At times, if you add too many URLs to your filter list, there might be no longer other ads available to target to your content. As a result, you may begin seeing less relevant or public service ads on your webpages.

Your site content is primarily in an unsupported language.
If the AdSense code is placed on pages with content primarily in an unsupported language, public service ads or ads in another language will appeared. You can refer to program policies, publishers may not display ads on pages with content primarily in an unsupported language, so please remove the ad code from these pages until we're able to support your language.

Your ad code has been modified
If the AdSense code has been manually modified, such as to change the ad unit width or height or the publisher ID. Please select the desired ad format on the AdSense Setup tab of your account and then paste the generated ad code, unedited, onto your pages. Keep in mind that modifications to your code are not permitted by our program policies.