These anchors were included as part of the AdSense Shopping Links Lab that you opted in to. They've been activated for you as you have both Shopping Links and Auto ads enabled.
What does this mean for me?
• Nothing on your site will change. We will continue showing Shopping Anchors for a percentage of traffic on eligible pages.
• The Shopping Anchors Lab does not have any effect on your existing enabled Anchor ads.
• If you prefer not to take part in the Shopping Anchors Lab, you may opt-out at any time directly from your account (by accessing Labs within the AdSense Optimization tab).
Should I stay opted-in to both Shopping Labs?
Yes, Shopping Anchors work best when paired with Shopping Links and do not interfere with any other formats.