In the architecture, carpentry, and construction industries, T&G stands for tongue and groove. This traditional and highly effective woodworking and jointing method features a protruding edge (the tongue) on one board that fits snugly into a corresponding slot or depression (the groove) of an adjacent board. This interlocking design creates a secure, flat, and stable surface widely utilized for installing hardwood flooring, wall paneling, subfloors, and outdoor timber decking while preventing lateral shifting and moisture seepage.