The presence of bonus rounds is a desirable feature in an online slot machine. Free spins with win multipliers are particularly appealing. Additionally, slots with a cascading engine provide an exciting experience as symbols explode during winning combinations, allowing new symbols to fill the gaps and potentially leading to chains of wins. Other notable features include wilds, sticky wilds, walking wilds, pick-me games, respins, and wild reels. It’s also important to consider the slot’s RTP (Return to Player) and hit rates, with an RTP above 96% and a hit rate of 25% or higher being preferable. For a highly interactive gameplay, keep an eye out for Megaways slots, Infinity Reels, and Role-Playing slots.