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.
At first PUBGM was PUBG pc but on mobile devices. The concept was exactly the same. But now with each new season and each new update PUBGM is becoming different then what it was supposed to be. Food for thought?