It is well known among many gamblers that Microgaming has the best online slots games, but what may not be known by some is they also have the best free slots promotions. There are several types of slots bonuses a player may be able to collect. You have the sign on bonus which many will give either “free play”, “free credits, “free slots spins”, or a “deposit bonus”. The free play offer is when a player can collect a certain amount and play during a period of time given by the casino. This is not done in the normal download lobby but when clicking to collect bonus the gambler is taken to a special flash version of the casino and allowed to play any of the casino games. After the play is finished then the amount won can be transferred into main lobby but normally requires a purchase to make the transfer. The free credits are just a small amount such as 10 free where you can play any of the online slots within the casino games. Free spins is on a certain slot machine the casino chooses. Deposit bonus is just that, you make a purchase and the casino will give additional money on top of your purchase. All the free slots bonuses are an excellent way to start your play at the casinos but what players neglect to realize is that the longer you are a player at a casino the more bonuses you will receive which are better than the original sign on promotions.