A jackpot is a grand prize offered by some slot and Live Casino games, awarded when a specific combination of symbols, scatters, or wilds lands during play.
Which symbols trigger a jackpot, and whether a game offers one at all, is determined by the game's RNG — it's a matter of chance, not strategy. Not every game offers a jackpot. Check a game's rules and paytable, available via "Where do I find a game's rules and instructions?", to see if it does.