You can prevent anchor ads from appearing at the top of the user's screen by modifying your ad code.
After you've made this change and saved your ad code, anchor ads only appear at the bottom of your pages. Keep in mind that by disabling this feature you may decrease your potential earnings.
Our experiments show that anchor ads perform better at the top of the user's screen.
To disable anchor ads at the top, add thedata-overlays="bottom"
parameter to the ad code on each of your pages with anchor ads.
<head>
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-1234567890123456" data-overlays="bottom" crossorigin="anonymous"></script>
</head>