Vacuum bags in vacuum cleaners serve as receptacles for collecting and containing dirt, dust, debris, and allergens that are suctioned up during the cleaning process. As air flows through the vacuum cleaner, it carries these particles into the bag, where they are effectively trapped.

Functioning as a filter, the vacuum bag plays a crucial role in separating the collected dirt from the air. This mechanism prevents particles from being released back into the environment during the cleaning operation, thereby reducing the risk of allergens and dust being redistributed. The use of vacuum bags contributes to maintaining cleaner indoor air quality.