Bonus symbols are special icons found in many slot games that trigger additional features or rewards when they appear on the reels. These symbols can lead to free spins, multipliers, or unique mini-games, enhancing the overall gaming experience and increasing potential winnings. When players land a certain number of bonus symbols, they often unlock exciting opportunities that are not available during regular gameplay. This adds an element of surprise and excitement, making online casinos and video slots more engaging for players seeking extra thrills and rewards.