Free spins come in different shapes. Some free spins are unconditional in so far as they can be used at any slot. This allows you to pick and choose the one that suits you best. This type of free spins is something more exclusive. Often you may need to look deep if you want to find such a deal. It is more common than online casino has chosen to tie your free spins to one or a pair of special slots. Normally free spins are connected to a certain slot. This means that you can only choose to use them on these slot machines. Fortunately, they usually belong to the newer and more popular slots. Therefore, it gives you great opportunities to explore new slot machines.