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.
Does it not only run games well but serve other purposes like browsing the web and whatnot? Also does it get along well with casual laptops? Casual laptop being one with decent enough specs to play games well.