A Player-hero with a high WITS rating can be clever, attentive, and ingenious. Any action that calls for an adventurer to be sharp-witted, sensible, or wise, benefits from a Player-hero’s WITS score

The One Ring 2e, p.29

A Player-hero’s mental aptitude affects those Skills that rely on quick thinking and creativity. A hero with a high WITS value will quickly learn witty oratory (Persuade), the arts of a burglar (Stealth), show attentiveness (Scan, Explore), and will be clever and studious (Riddle, Lore).

The One Ring 2e, p.61