If you are a small site adding ad units to your pages then the advice we give you is simple: on every page you should add a 728×90 at the very top, a 300×250 on the top right and a 300×600 in the left ...
If you are a large site adding ad units to your site, or just wanting to check the setup of your site is the best you can do, then our ad size guide is for you. As with small sites, having the three ...
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