Inflating tyres (cars, bikes) and other inflatable equipment — the stored compressed air makes inflation quick and efficient.
Powering pneumatic tools in workshops or garages: e.g., impact wrenches, air ratchets, nail guns, sanders.
Spray painting, varnishing or coating work where a consistent flow of air is needed for the spray gun.
Blowing off dust or cleaning surfaces with an air-gun attachment in a workshop or industrial setting.