They are also called free spins, free spins, bonus spins. This term means that the player is given the opportunity to spin the reels for free.
Usually, when it comes to freespins, it refers to either a casino bonus or a slot machine bonus round. If casino bonus is meant, it means that the player gets a chance to spin the reels for free a certain number of times.
For example, an offer from the casino might look like this: 50 frispin slot Berry Burst from NetEnt https://no-deposit-bonus-casino.net/50-free-spins-no-deposit/. The proposal should also specify the value of each spin. Suppose it is 10 cents. So, the player will spin the reels 10 times without paying anything. It's as if the casino pays for it.
The value of each spin largely determines the value of the freespins. After all, all winnings go as a multiplication of the player's bet. There is a big difference between betting $0.1 or $20 per spin. The same combination, which pays 100x of the bet, will yield winnings equal to $10 or $2,000, respectively. The standard cost of a free spin is 10 cents.
If you compare the bonus spins with a test game, the choice in favor of the first option is obvious. After all, in this case, you can hope to win and be able to withdraw the money. As a rule, it will not be real money, but bonus credits. But you will eventually be able to turn them into real money. This is done through wagering.
In a nutshell, wagering is the requirement to wager a certain amount, such as $500. You don't have to lose that exact amount. You just need to collect in the $500 wager amount. When the goal is reached, your bonus funds are converted to real money and can be withdrawn. Read more about wagering here.
It should be noted that it's not the value of the freespins themselves, but the winnings from them that must be wagered. In the case of 10 free spins of 10 cents each, the total value is $1. But it's not them that will count, but how much the player won from them. This can be any amount, either less than the value of the freespins or much more than that. For example, $50.
Usually operators offer freespins to new customers or existing players when they promote the latest releases. You can divide them into two big categories: deposit and no deposit. That is, in order to get the spins, you either have to deposit into your casino account, or you just have to register. Read more about no deposit bonuses here.
No deposit offers are less common and wagering conditions are not the best. But for deposits casinos often offer to spin slot machines for free on more favorable terms. Often, the proposals combine freespins with cash bonuses. For example, 20 spins 50% over the deposit.
To get freespins, sometimes players are required to take certain actions in addition to registration or deposit. For example, enter a bonus code at a certain point, or contact support and request them there. This is given a limited time, so if you don't see that you've been awarded spins, contact support. You may have missed some condition.
Since you can get freespins on a specific slot or slots, sometimes you need to activate them by downloading the corresponding slot machine. The time for activation is usually limited too, so read the bonus terms and don't delay in completing the requirements.