A dog leash is a tool used to control and guide a dog during walks or outings. Typically made from materials like nylon, leather, or chain, it attaches to the dog's collar or harness. Leashes come in various lengths and styles, including retractable options that allow for more freedom of movement. Using a leash is important for the safety of both the dog and the public. It helps prevent the dog from running away or getting into dangerous situations. Additionally, a leash can assist in training, making it easier to teach commands and proper behavior while out in public spaces.