User Generated Content (UGC)
UGC stands for User Generated Content and covers all content created by the users themselves rather than by the company or publisher behind the platform. Reddit, YouTube and Instagram are all built on UGC: the platform supplies the frame, the users supply the content. At the other end of the spectrum sit news media and company blogs, where the sender produces everything.
User content only appears when contributors get something out of contributing, whether that is help from others, standing in a community or visibility for their own name. And because most interests already have a functioning gathering place that a community rarely leaves, the attempts that succeed tend to appear in niches that have no good one yet.
Where a platform for user content does take hold, a forum for instance, it can produce visibility on enormous volumes of long-tail keywords, because users ask and answer questions no editorial team would have time to cover. Google's updates have lifted sites with genuine user content in recent years, most visibly Reddit. The context matters: UGC is Reddit's core product, not a maneuver in its SEO work, and that result does not transfer to a forum plugin in the corner of a site.
AI search pulls the same way, since language models lean heavily on forums and reviews when they compare products and recommend suppliers. Where an effort like this belongs in the priorities is a question for the guide to SEO strategy.