Crouching in Fortnite on Xbox allows players to lower their character’s profile, making them a smaller target for opponents. This can be useful in a variety of situations, such as when taking cover behind objects, sneaking up on enemies, or trying to avoid being spotted from a distance.
To crouch in Fortnite on Xbox, simply press and hold the left thumbstick. Your character will then crouch down and move more slowly. You can release the left thumbstick to stand back up.