Free Spins Slots
Free spins are rounds played without further staking, usually triggered by scatters, and the rules state the trigger count and any special behaviour.
How free spins work
Free spins are rounds the game plays without taking a further stake, and any wins they produce are settled at the stake of the triggering spin. The most common trigger is a set count of Scatter Symbols, with 3 scatters awarding a round in a large share of games. The rules state the trigger count and the number of spins awarded.
A free spins round rarely plays like the base game with the price removed. Games commonly change behaviour inside the round, for example by adding Multipliers, richer reels or persistent symbols. The rules should describe every change, because the differences decide what the round is actually worth.
Several details deserve a close reading. The first is whether the round can extend itself, which is covered on the Free Spins Retrigger page. The second is whether spin wins share a pool or settle individually. The third is what happens to an unfinished round when a connection drops, and the rules of many games are silent on that point.
Where a game sells direct entry to its round through a feature purchase, the paid route and the triggered route can carry different published figures. A player comparing the two should look for a separate RTP line for the purchased round, because studios that disclose one usually print it in the game rules.
Free spins remain the most common bonus type in modern slots, and the quality of their disclosure varies more than the feature itself. The trigger, the count and the changes inside the round are the three lines to find before judging any of it.