Uno is a popular card game that is easy to learn and fun for players of all ages. The objective is to be the first to get rid of all your cards by matching them to the top card of the discard pile by color or number. Special action cards can change the game, allowing players to skip turns, reverse play, or make others draw cards. Players start with seven cards and take turns playing their cards while trying to shout "Uno!" when they have only one card left. The game encourages strategy and quick thinking, making it a favorite for family game nights and gatherings with friends.