Tic Tac Toe is a classic two-player game played on a 3x3 grid. Players take turns marking a square on the grid with their respective symbols, typically X and O. The objective is to be the first to get three of their symbols in a row, either horizontally, vertically, or diagonally. If all squares are filled and no player has achieved three in a row, the game ends in a draw. It’s a simple game that requires strategic thinking and planning.