Tic Tac Toe, also known as "noughts and crosses," is a two-player game typically played on a 3x3 grid. The objective of the game is to be the first to form a line of three of your symbols (either "X" or "O") horizontally, vertically, or diagonally on the grid. Players take turns placing their symbol in an empty space on the grid. The game ends when one player achieves a winning combination or when the grid is completely filled, resulting in a draw.