A leaf blower propels air out of a nozzle to move leaves and grass cuttings into manageable piles that you can then shred and mulch with a leaf shredder/mulcher. If you're wondering which one you need for your yard, the answer is both: a leaf blower will help you clean up your garden waste and debris in no time, while a shredder will help get rid of those piles and create mulch for your garden.