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 rope, 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 the dog remains secure. Leashes can also vary in style, including standard, retractable, and training leashes. Retractable leashes allow for adjustable lengths, giving dogs more freedom to explore while still being under control. Using a leash is essential for safety, helping to prevent accidents and ensuring responsible pet ownership.