2048 is a number puzzle game where you slide tiles on a 4x4 grid to combine matching numbers. Use the arrow keys (or swipe on mobile) to move all tiles in one direction. When two tiles with the same number collide, they merge into one with double the value (e.g., 2 + 2 = 4, 4 + 4 = 8). Keep combining tiles to reach 2048 before the grid fills up. Plan your moves strategically to prevent getting stuck!