To play Tic-Tac-Toe, follow these simple steps: 1. The game is played on a 3x3 grid. 2. Players take turns placing their mark (X or O) in an empty cell on the grid. 3. The goal is to be the first player to get three of their marks in a row, either vertically, horizontally, or diagonally. 4. If all cells are filled and no player has three in a row, the game ends in a draw. 5. Enjoy playing and may the best player win!