A cordless drill is a portable power tool used for drilling holes and driving screws without the need for a power outlet. It operates on a rechargeable battery, making it convenient for use in various locations, including homes and construction sites. The drill typically features adjustable speed settings and a keyless chuck for easy bit changes. Cordless drills come in various sizes and power levels, suitable for light tasks like assembling furniture or heavy-duty jobs like building decks. They are popular among both DIY enthusiasts and professionals due to their versatility and ease of use.