Depending on which of the game's multiplayer modes you're generating the map for, you'll need a certain amount of spawn points, flag depots, and capture spots. If you've missed something when you run the validation check, the game will let you know what's missing and give the option to snap directly to what's out of place or needs to be tweaked. Once the game determines the map is fit for publishing, players can push the map live and send it through to Ubisoft's servers or host multiplayer games with it. Any players who connect to that match would then download the map.