How do you add group thumbnail on roblox?

To add a group thumbnail on Roblox, first, ensure you are the owner or have the necessary permissions for the group. Go to your group's page, click on the three dots (More Options) next to the group's name, and select "Configure Group." In the "Group Info" tab, you can upload an image as the group thumbnail. Make sure the image meets Roblox's guidelines, then save your changes.