Typing "~ ~ ~" in chat inserts your coordinates in your message when sent.

Currently in Bedrock, you have to write down your coords or memorize them, then type them out. Or in Java, have F3 debug open and manually type them out in chat. This feature would make it easier to inform other players in your Realm or multiplayer server game about things to go see, or to warn them about things to avoid. It would simplify cooperative multiplayer without making anything overpowered. For people who don't want to allow it for whatever reason, you could let it be disabled under a /gamerule toggle or chat setting.