Tagging is free, which is why it is overdone. Every tag says: this post is relevant to you, and to the people who follow you. Sometimes that is true.
When a tag is welcome
- They are in it — the photograph, the work, the room
- You are crediting them for something they actually did
- You agreed beforehand that this post was coming
When it is not
Tagging ten accounts in the hope that one reshares is a strategy people can see from a distance, and it is the reason so many accounts now hide tagged posts by default.
Collaborations, properly
A collab post appears on both profiles and pools the reach. It is a real mechanic and it works, but it needs both people to accept it — which means it needs a conversation first, not a surprise notification.
Credit is the cheapest thing you can give and the most remembered. The photographer, the venue, the person who made the thing you are holding — name them, even when nobody would have noticed the omission.