Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
I played it before this website existed and personally I think it's a very fun experience to grind your first character to max. You collect cool mounts and armors along the way but it's much more fun with friends for sure, good thing is it's not hard to make friends in this game. Overall, if you have no money play this MMO but if you do have money WoW is the way to go. (Rhymes)