@Sammy Rey x -- They are tokens used in the Prestige Shop which is unlocked after your first Prestige in MW3. You can reset your stats,get a new custom class,carry over a piece of equipment,gun or perk for the rest of that prestige, get double xp or double weapon xp for 2 hours or get 3 different sets of Titles and Emblems. You also get 1 prestige token after every prestige which you can either spend on one of those things listed or save them up.