Most ranked players peek the same way every round — wide swings into common angles. That makes you predictable. Three peek types matter: wide swing (commit), jiggle peek (test), and shoulder peek (bait the AWP).
A wide swing is for known holds where you have utility advantage and a teammate trade lined up. You leave cover fast, take the duel, and either kill or trade. No middle ground.
A jiggle peek is for testing an angle when you suspect AWPing. Step out for ~250ms, counter-strafe back. The AWPer wastes a shot or commits. You haven't spent any economy and you have information.
A shoulder peek shows just your character's edge. Same purpose as a jiggle but with no exposure of your aiming line. Lower risk, lower information return.