Many players believe that the spinning reels determine the outcome, but the reality is much simpler: the result of your spin is decided the microsecond you press the "Spin" button. The animation you see is merely a visual presentation—a digital storytelling device—to build anticipation before revealing a result that already exists in the game's memory.
This is made possible by a system called the Random Number Generator (RNG). The RNG is a sophisticated algorithm that generates thousands of numbers every second, even when no one is playing. When you click spin, the game captures the current number and maps it to a specific symbol combination on the reels. Because this process is purely mathematical, every single spin is an independent event. This means the game does not "remember" if you have been losing for ten spins or if you just hit a big win; the odds of the next spin remain exactly the same as they were for the first.