A toothbrush is a small tool used for cleaning teeth. It usually has a handle and a head with bristles that help remove food particles and plaque from the surface of teeth. Regular brushing with a toothbrush is important for maintaining good oral hygiene and preventing cavities. Toothbrushes come in different types, including manual and electric versions. Manual toothbrushes require you to move them by hand, while electric toothbrushes do the brushing for you with vibrating or rotating heads. Both types can be effective, but it's essential to use them properly and regularly for the best results.