To redeem a Roblox gift card, follow these steps:

1. Go to the official Roblox gift card redemption website at roblox.com/redeem using a web browser (this cannot be done directly in the Roblox app).
2. Log in to your Roblox account.
3. Scratch off the protective layer on the back of your physical gift card to reveal the code (or find the code in your digital purchase).
4. Enter the revealed code (PIN) into the "Enter Your PIN" box on the redemption page.
5. Click "Redeem" to add the credit or Robux to your Roblox account.
6. After redeeming, you can use the credit to buy Robux, Roblox Premium, or other items. Sometimes the card also grants a free virtual item.

Make sure you are logged into the correct Roblox account to have the gift card credited properly. If you have trouble reading the code, some letters may look like numbers and vice versa (e.g., zero and O, 1 and I).

Here is a quick step summary:

Step| Action
---|---
1| Go to roblox.com/redeem in a browser
2| Log into your Roblox account
3| Scratch off card to reveal code
4| Enter code in the box and click Redeem
5| Credit added; spend on Robux or Premium

This method works on PC, mobile browser, and tablets but not inside the Roblox app itself.