Advantage Points are used to configure advantages for use in Campaign games. A certain set number of points per player slot are available for any given game (default 500). These points can be used to select from a player's researched advantages and starship hulls for their chosen race. Some default advantages and starship hulls can also be disabled, possibly providing additional advantage points.
It is important to remember that every race comes pre-set with a certain number of advantages, and that the points of each of these are assessed against the points total.