Tag people in your posts. Add tags to anything you post, including photos and updates. Tags can point to your friends or anyone else on Facebook. Adding a tag creates a link that people can follow to learn more.ell people about stuff theyâre in. Adding tags can let people know when they're in photos or other things you share. People you tag can receive a notification so they can see your post. The post may also go on the person's profile and appear in their friends' news feeds.