A Loop is an attacking shot with a lot of topspin. It loops up high (hence the name) but on contact with the table it will kick forward at speed. This makes it difficult to return well.
If your squad player has a Loop unlocked, then you can execute it by hitting ATTACK when you receive a long ball. But you must hit it in the PERFECT timing zone.
👍 TOP TIP
Loops are very effective in stopping Defenders from using their chops. Returning a loop with backspin will make the ball go very high - usually missing the table completely.