Volatility (sometimes called variance) describes how a slot pays, not how much it pays overall — that overall figure is RTP. Two slots can share the same 96% RTP and feel completely different to play: a low-volatility slot pays small wins often, smoothing out the ride, while a high-volatility slot pays rarely but can hit for a much larger multiple when it does.
This has direct practical consequences for bankroll and session length. Low volatility suits smaller bankrolls and longer, steadier sessions, since losing streaks tend to be shorter and wins arrive often enough to keep a session going. High volatility suits players who can tolerate long stretches with no meaningful win in exchange for a shot at a much bigger payout — and it should be paired with smaller individual bet sizes than usual, not bigger ones, since the swings are wider in both directions.
In practice, volatility ratings (usually shown as low, medium, or high) are published by the game studio itself or by independent slot database sites, often alongside a numeric estimate. Checking a game's volatility rating before playing — the same way you'd check its RTP — sets a realistic expectation for how a session is likely to actually feel, rather than judging a game only by its headline RTP number.
