November 30, 2022
Today, we're announcing a new ad format called side rails. Side rails are ads that stick to the sides of your pages when they're viewed on widescreen devices, such as desktops. If you already have anchor ads turned on, side rails will automatically start to appear on your site after December 13, 2022.
If you'd prefer not to show side rails, you can turn off this option in your Auto ads settings.