This plugin allows for easier coordination between players. If for example chat was disabled, Request Location would allow players to still give their location to other people. Even if chat is enabled, the copy-to-clipboard feature makes it much simpler to put a player's location into your waypoint mod.
Simply just use the requestlocation command with a username and you will then send a location request to that player. Within 60 seconds of your request, the player can choose to either accept or deny it (via buttons or commands). If they accept your request, you're given their location in a readable format, telling you either their distance from you or their dimension (if not in the same as you).
requestlocation PLAYER_USERNAME- Requests the location of a playerrequestlocation accept- Accepts your latest requestrequestlocation deny- Denies your latest request