How quickly will Google ads start appearing on my site?

After you've been accepted into the program and have implemented the HTML ad code on your site, ads will start running within minutes. If your site is not yet in our index, it may take up to 48 hours or more before we are able to crawl your site. Until your site has been crawled, we may display public service ads, for which you will not receive earnings.

Your ad relevancy should increase over time. However, keep in mind that if you make changes to a page, it may be 1 or 2 weeks before our crawler captures the changes and updates our index to provide more relevant ads.

Adding the AdSense for search code to your pages will instantly generate an AdSense for search box. As search results are displayed on Google-hosted pages, relevant ads will appear immediately, if ads are available for the particular query.