How shared endorsements work
Google sometimes displays your reviews, recommendations, and other relevant activity in its products and services. This may include shopping contexts, like Google Play and ads. The profile name and profile photo of your Google Account may appear with that activity.
For example, if you search for "Italian restaurants," you may see an ad for a nearby restaurant along with someone’s favorable review. Or, in Google Play, you may see that someone else has reviewed a new song or album.
For users under 18, actions won't appear in shared endorsements in ads and certain other contexts. The shared endorsements setting isn't available for Google Accounts for kids under 13.