When you choose a feat instead of an ability score improvement, you can either take two of the following feats or just one and improve an ability by 1. Feats are described between pages 165 and 170 of the Player's Handbook.
Feats: Athlete, Charger, Dual Wielder, Mage Slayer, Martial Adept, Mounted Combatant, Polearm Master, Weapon Master.
[This feat is supposed to be a racial feat designed for Humans]