A deadspin is a game round on a Slot machine where no payout takes place. The Bet is retained and no winnings are paid out. It is obvious that not all spins on Slot machines can result in a win. Instead, it is the hit frequency that determines what the percentage ratio is between successful spins compared to "dead" spins. For example, if a slot machine has a hit frequency of 50%, then this information means that statistically every second spin results in a win. The rest of the spins are dead spins. The lower the individual hit frequency, the higher the percentage of deadspins.
Generally speaking, the share of "dead" spins is correspondingly higher on slot machines with high volatility. The winning spins are accordingly rarer. However, in the event of a win, this is statistically more attractive, as it is simply paid out less frequently. Deadspins are therefore used to finance rare and "expensive" winning series for the casino. Basically, it is a matter of personal taste. If you accept a low hit frequency, you will have to accept many deadspins, but in the long run you will benefit from higher wins. If the hit frequency is correspondingly higher and the number of "dead" spins thus lower, then the payouts per "win spin" tend to be lower. Ultimately, of course, each dead spin serves on the one hand to finance the wins in other game rounds and also to ensure the house advantage so that the Casino operators can cover their costs.