A wild symbol is a special feature found in many slot games and card games. It acts as a substitute for other symbols, helping players create winning combinations. For example, if a player has two matching symbols and a wild symbol appears, it can complete the set, leading to a win. Wild symbols can come in different forms, such as expanding wilds or sticky wilds. Expanding wilds cover an entire reel, while sticky wilds remain in place for multiple spins. These features enhance gameplay and increase the chances of winning, making wild symbols a popular element in gaming.