Google Adsense Ad FormatChoosing a Google Adsense Ad Format is very tough. The thought is to pick an Ad that you reckon will convert well on your web page and not to let the structure of your website point out it. This means that you go ahead and pick an Ad that you like and then re-arrange your site to fit it in. If you were to place the Adsense ads in spaces which are empty, then the conversions are going to be lower than if you really placed the Adsense Ads in a place they would integrate well with your website’s content. This shows that placement of Adsense Ads is far more vital than the format and color of the ads. Google Adsense tells publishers that a wider Ad Format is far more effective than a longer Ad. They say that the wider ads are far more reader friendly. Most publishers say that they find they earn more from having ads such as the 336×280 large rectangles or the 160×600 wide skyscrapers on their sites rather than other formats. Thriving publishers also say that using a large rectangle in content sites is a very effective way of earning more from the site. Remember, you are free to use more than one Ad unit on your site.
You are allowed to use 3 regular ad units and 1 link unit per page on your site.