Overcome user ad-blindness with better ad placements
A general principle for ad placements says that you should place your ad units high up on the page so your users will see them easily. However, ad units placed at the absolute top of the page (before any content) tend to suffer from user ad-blindness and on average show a 61% lower CTR than ads below the header and closer to the content.
If you have an ad unit at the very top of the page, you should test whether moving the ad unit closer to the rest of your content, yet still above the fold, improves the ad performance.
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