Google Adsense announced that anchor ads, the AdSense ads that stick to the top or bottom of the page when you scroll down, are now supported on larger screens. Google launched anchor ads on AdSense in 2013 and has expanded its functionality over the years.

Google said, "Anchor ads now support a wider range of screen sizes. For sites with anchors enabled, anchor ads will soon begin to appear on larger screens, such as desktops. Our experiments show that anchor ads work well on larger screens."

Anchor ads will begin to appear on larger screens after July 19, 2021.

Google said that if you don't want anchor ads to appear on your larger screens, you can disable this option using the new Widescreen" control in your automatic ad settings.

As a reminder, AdSense anchor ads stick to the edge of the user's screen and, according to Google, are easily disabled. These ads are primarily served on cell phones, but can also appear on desktop computers. They appear at the top of the user's screen unless we determine that it would negatively impact the user experience, in which case we display them at the bottom. When displayed at the top, anchor ads only appear after the user has scrolled far enough, so they never cover your site's branding or navigation.

Discussion on the forum WebmasterWorld.