Basically there's specific game modes on the map that you have to play. There is a certain amount of wins you have to get before you can "capture" a location. For example, there is a TDM location with 40 wins to capture. You have 17 people in your clan that is playing TDM at the time. Now, as long as they win a game, you get a win towards that location per person. 17 players win a tdm game = 17 wins towards that tdm location