A hot glue gun is a handheld tool that uses heat to melt adhesive sticks, allowing for quick and easy bonding of various materials. It is commonly used in crafts, home repairs, and DIY projects. The melted glue cools and hardens rapidly, creating a strong bond between surfaces like wood, fabric, plastic, and metal. Hot glue guns come in different sizes and types, including low-temperature and high-temperature models. They are user-friendly, making them suitable for both beginners and experienced crafters. Safety precautions, such as using protective gloves, are recommended to avoid burns from the hot glue.