Online slot games offer players the opportunity to win a jackpot through spinning symbols. They differ from physical slot machines in that they are programmed with a Random Number Generator (RNG) to select a set of numbers every millisecond. This is a software element that cannot be tampered with by the player or casino and is independently tested and verified.

The RNG will then connect one of those numbers to a particular outcome on the reels, such as a symbol being displayed or not. Once the spin is complete, the results are compared with theoretical projections and any winnings are credited. Some slots also feature a progressive jackpot, which will increase with every bet placed on the game. This jackpot is awarded through a combination of symbols or through a bonus game and is usually based on a specific theme, such as a movie, TV serial or a popular music band. Branded slots are developed by companies like Microgaming, Playtech and NetEnt through licensing agreements.

A wide range of real money slot games are available to players, with each offering its own unique storyline and gaming mechanics. The best way to find a suitable slot machine is to explore free play options and demo modes before depositing any money. It is also important to understand that different slot games are classified in terms of their volatility, with high-volatility slots tending to deliver large payouts less frequently while low-volatility games will offer smaller wins more regularly.