Tongue and groove is a woodworking technique used to join two pieces of material, typically wood, together. Each piece has a protruding edge, called the "tongue," that fits snugly into a corresponding groove on the other piece. This method creates a strong, seamless connection, making it popular for flooring, paneling, and cabinetry. This technique not only enhances the structural integrity of the joint but also improves the aesthetic appeal by minimizing visible seams. Tongue and groove joints are commonly found in various applications, including hardwood flooring, ceiling panels, and furniture, providing both durability and a polished look.