We will inform you of the applicable Roblox promo codes as of January 2023. Promo codes are short-lived and you never know when they will expire, so it's best to apply them as soon as you see them. So here's the January 2023 promo code. 1. What is a Roblox promo code? Promo codes are event-type gifts that distribute items applicable to Roblox. Costumes or accessories used to decorate a character..