The Tic-Tac-Toe game is a classic and straightforward two-player contest where participants take turns marking a 3x3 grid. The objective is to align three of their symbols (either "X" or "O") horizontally, vertically, or diagonally before the opponent. The game includes a responsive design, a reset button, and the option to play against a computer opponent with adjustable difficulty levels. It offers a timeless and enjoyable experience of strategic competition in a modern digital format.