The excitement around Grow a Garden has already helped Roblox's stock more than double this year. Since January, it's up ...

For Roblox, its business model centers on the Robux digital currency, which users purchase to acquire virtual items, accessories, and in-game enhancements through a robust marketplace.

Roblox's players can buy Robux on an a la carte basis or through discounted subscriptions, while creators can accumulate it and cash it in for real-world currencies.

Learn how to set up a Roblox account, where to find stuff in the app, what types of games you can play, and what exactly Robux are.