Online casinos have been offering different kinds of casino games over the years. Slots have, however, remained their main value. The main thing that made online slots so popular is that one can play free slots without having to actually go to a casino. One can do it from the comfort of his home via desktop/laptop or even on the go using his smartphone or tablet.
Nowadays one can find literally a bunch of free slots on the Internet which he can play with no need to download the game itself because many casinos provide an instant play mode directly through their webpage.