"Scatter symbols" are special symbols found in online slots are not tied to any specific win line. Instead, they can appear anywhere on the reels and trigger wins. Scatter symbols are often the key symbol to triggering bonus games or free spins. Once a sufficient amount of scatter symbols appear on the reels, additional features such as bonus rounds or free spins are often activated. It's important to note that scatter symbols do not have to be part of a winning combination in order to trigger a payout. Scatter symbols are an important part of many online slots and help make the slots even more exciting.