is there any strategy at all or just spin and hope

I've always stuck to card games where you can push the odds a little, but lately I’ve been dabbling in slots just for kicks. Trying to wrap my head around whether there’s actually anything you can do to improve your chances. Everybody says it’s all luck and the machines do whatever they want, but there’s talk about timing, bet sizing, and when to stop or move to another machine.

I know with poker and even blackjack there’s long-term strategy, bankroll management, reading patterns. But slots seem totally random to me. Are any of those so-called “systems” legit, or are they just there to make you feel less helpless while spinning? Anyone here actually try to work a strategy or do you just treat it like pure entertainment?