UGC stands for user-generated content. It means something was made by a user or creator rather than supplied as part of the original platform.
On Roblox, people often use UGC to mean avatar accessories. The full meaning is wider and can also cover games, models, audio, plugins and other creator-made work.
Why avatar items are called UGC
Roblox once made most catalogue items itself. As creator publishing expanded, users began making hats, hair, clothing and other avatar items for the Marketplace.
That is why somebody may say they won free UGC after an event. They normally mean a creator-made avatar item, not every kind of user-created content.
UGC is not automatically official
An item appearing on Roblox does not mean Roblox designed or recommends it. Check the creator name, item page and price before buying or joining an event.
Copies can look similar to an original item. If an event promises a reward, use the link from the real game creator instead of a random message.
Can anyone upload UGC?
Roblox has publishing rules, fees and account requirements that can change. Creators also need to follow intellectual property and Marketplace policies.
Making your own design is not permission to copy a film character, brand logo or another artist's work. Original ideas are safer and usually more interesting anyway.
If you want to create, start by learning the current Roblox publishing rules rather than following an old video with outdated requirements.