It is a function that adds Territory points to a specific territory using the character/ship Galactic Power (GP). There are missions and… platoons/fleets you can fill up with characters/ships. I say it like this because platoons for early guilds like mine are very hard to fill. The goal of each zone/territory (idk what they are called exactly) is to increase the total of each one to at least 1 star’s worth (this increases the further you push through the holotable map), so that you may gain more rewards from the end.
Within each zone there are missions which increase the total points by a milestone amount for each wave you pass in it.
There are special missions within territories that reward extra tokens or even a character shard (which increases in count by the amount of players succeeding the mission). Special missions and certain nodes have a required character(s) which if you deploy else where locks you out of it.
Territory Battles are to be a guild effort. (Soloing it like I have been yields some rewards but not the most).