I have also played slots at various casinos a few times, based on my own experience, I can say that it does not require understanding strategy because your winnings depend on luck and it is easy to play.  But there are also variations of slots, some have a buy feature, others have a choice if you take your winnings in the bonus round or gamble more, such scenarios.  So it also depends on what your decision will be.  But if you want to win big, you also really need to bet big, that's all, you won't lose the risk.  You can win on small bets, and you can also lose on big bets.