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.
So I used to play LoL. Now I haven't played for like 3 years I think. I'm thinking about getting back into it and I was wondering why does it matter which lane you go into for a champion?