In plain English
User-generated content: material submitted by users, such as forum posts, reviews or comments; rel=“ugc” can identify links within it.
Why it matters
This term helps you assess recognition and credibility without reducing SEO to a promise or a single number.
Example
A community forum marks links added in member posts with rel=“ugc”.
Common misunderstanding
Context matters. This concept does not guarantee rankings and should not be used to justify manipulative link building.