Imagine our dj friend has a biiig booty, so swing your hips into the wall with your mouse to have alot more aim control while moving.
Learn the map like tracer blinks,where is the next doorway/wall and how to subconsciously move in a jump knowing where the next wallride connection is going to occur and make use of every surface available to avoid damage.
His boop is not just fun to get environmental kills but is very useful when used right and this works most effectively on tanks moving them out of position as the primary objective. when not booping tanks off the payload or moving his shield/matrix from a target, the boop can net many solo kills on unsuspecting low hp enemies by booping them into a wall and already be tracking and unloading a clip into them can usually get a kill before they can react to kill you.
When he fires Boop that takes 4 ammo, if you have 1 ammo left before reloading you can fire a boop with the remaining 1 ammo.