Does a vacuum use suction?

Does a vacuum use suction, yes, a vacuum cleaner uses suction created by pressure difference to move air and debris, but suction itself is not a pulling force, it is result of higher outside pressure pushing air into low pressure area. How it works is motor drives fan that expels air from inside cleaner, creating low pressure region inside dustbin, outside atmospheric pressure is higher, so air rushes in through nozzle carrying dust and dirt, which is then trapped by filter or bag. In physics terms, vacuum does not suck, it is atmospheric pressure pushing. The strength of suction is measured in air watts, pascals, or inches of water lift. Industrial vacuums use same principle with stronger pumps. For scientific vacuum chambers, suction concept is similar but goal is to maintain low pressure for processes, not cleaning. So yes, vacuum cleaner uses suction effect, but technically it creates pressure difference that causes air to flow inward, carrying particles, which is perceived as suction. Without suction from pressure difference, vacuum cleaner could not pick up dirt.