Roblox Star Codes can be entered when purchasing Robux in Roblox to give famous Roblox creators a small percentage of the purchase.

Roblox offers a feature called a "star code" that allows players to donate to content producers by entering their specific star code during in-game purchases.

Typically this requires you to spend Roblox’s in-game currency Robux, which can be earned by creating games, selling items, or trading real-world currencies for them.