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, leashes come in various lengths and widths to suit different dog sizes and breeds. They often feature a clip at one end to attach to the dog's collar or harness, ensuring safety and preventing the dog from running away. Leashes can also come with additional features, such as padded handles for comfort or retractable designs that allow for adjustable lengths. Using a leash is essential for responsible pet ownership, as it helps maintain control and ensures the safety of both the dog and others in the environment.