I saw a handheld electric blower on a shopping site that says it has dust bag. This is not a hair dryer. Since it just blows away dust, what is the use of dust bag? How can one use the dust bag?
Its primary use is to keep the impeller and impeller bearing clean. There's really no other reason that I know of on a pure blower. Sometimes blowers are reversible and can become vacuums with a catch bag, but that isn't the case here.