A pet leash is a tool used to control and guide pets, primarily dogs, during walks or outings. It typically consists of a long strap made from materials like nylon or leather, attached to a collar or harness. Leashes come in various lengths and styles, including retractable options that allow pets to explore while still being under control. Using a leash is important for safety, as it helps prevent pets from running into traffic or getting lost. Additionally, leashes can promote good behavior by keeping pets close to their owners and reducing distractions from other animals or people in the environment.