What is a vacuum cleaner?

A vacuum cleaner is used to suck up a mess or dirt in a carpet or on tile or wood floors, and all the gross junk goes into a bag or container you throw away or dump in trashcan.

It's a device used in cleaning in which suction is the prime source for picking up dirt and debris from the floor, walls, upholstery etc via a vacuum in the machine. Standard vacuums stand upright and with the motor running have a brush that spins to aid in the cleaning along with the suction.