Feats are special abilities that are independent of your class, that you can get at certain levels. They're like perks from Fallout or talents from WoW. You don't automatically get them, though. At certain levels, such as 4, 8, etc. you get an ability score improvement. You get 2 points to add to your base attributes. But if you want to, you can GIVE UP that ability score improvement to take a feat instead.
Ooooh, thank you very much! I think I get it now
