One of the most common misconceptions about online slots is that the reels "spin" and then stop on a result. In reality, the outcome of every single spin is decided the exact millisecond you press the button. The animation of the spinning reels is simply a visual presentation designed to create excitement; it does not influence the result.
This is made possible by the Random Number Generator (RNG). The RNG is a sophisticated algorithm that generates thousands of random numbers every second, even when no one is playing. When you initiate a spin, the software picks the current number from the sequence and maps it to a specific combination of symbols on the reels.
Crucially, every spin is an independent event. This means the result of your previous spin has zero impact on the next one. A game does not "remember" that it hasn't paid out in a while, nor does it "know" if you have just had a big win. Each press of the button is a fresh start with the same mathematical probabilities.