To ensure you are always getting the best results from your ad units, we recently introduced some updates to our ad serving process enabling our larger ad units to serve similar-sized display ads. We’ve already updated this for our 300x600 and 970x90 ad units and now we’ve extended this flexibility to our 336x280 ad unit, allowing it to serve a 300x250 ad when doing so will maximize the performance of that ad unit for the publisher.
With this change you may now occasionally see a 300x250 ad served in your 336x280 ad unit when that unit is opted in to showing image ads. 300x250 and 336x280 image ads will both compete for your 336x280 ad unit with the most competitive ad served thus maximizing the earnings on your ad unit. When a 300x250 image is served it will be centered in the 336x280 ad unit as illustrated below.
|300x250 display ad served within a 336x280 ad unit|
Aside from ensuring that you’re getting the most from your ad units, this change gives advertisers the opportunity to expand their reach with their existing ad creatives. To maximise your earnings potential with this change, don’t forget to enable both text and image ads for your ad units. You can opt out of having similar-sized display ads served in your ad units but remember this may impact your earnings. When you opt out, this applies on an account level and not just on an individual ad unit. To opt out, go to the Allow & block ads tab in your account, click the Ad serving tab in the top horizontal bar and select the block option under the “Similar Sized Display Ads” header. Tell us what you think about these new changes on our AdSense +page.
Posted by Amit Mhatre - AdSense Software Engineer
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