The "L Block" is a term commonly used in the context of Tetris, a popular puzzle video game. It refers to a specific shape made up of four connected blocks that form the letter "L." This shape can be rotated in different ways, allowing players to fit it into various spaces on the game board. In Tetris, players aim to arrange falling blocks, including the L Block, to create complete horizontal lines. When a line is completed, it disappears, earning the player points. The L Block is versatile and can be used strategically to fill gaps and clear multiple lines at once.