Lean Peeking (Q/E)
Lean peeking exposes the minimum amount of your body while allowing you to shoot. Press Q or E to lean, then ADS and fire. Your head and shoulder peek out from cover while your torso stays protected. This is the foundation of safe gunfighting in PUBG.
Jiggle Peeking
Jiggle peeking means rapidly moving in and out of cover (A-D-A-D) to bait shots and gather information. Do not shoot while jiggle peeking; the goal is to make the enemy waste shots, then counter-peek when they reload or reposition.