A pool vacuum is a device designed to clean swimming pools by removing dirt, debris, and algae from the water and surfaces. There are different types of pool vacuums, including manual, automatic, and robotic models. Manual vacuums require the user to guide them, while automatic and robotic vacuums operate independently, using suction and brushes to clean the pool efficiently. These vacuums connect to the pool's filtration system or operate on their own, depending on the model. Regular use of a pool vacuum helps maintain water clarity and hygiene, ensuring a safe and enjoyable swimming experience for users.