Refers to content uploaded to a website by the users of the site rather being created and posted by the site owners. The most popular UGC sites are social media sites such as Facebook, Pinterest, YouTube and Twitter. Online forums and wikis are another popular form of User-Generated Content.
User-generated Content can also be used for specific functions, such as reviews, in web sites with primarily admininstrator-generated content. Examples include Amazon and Yelp reviews and the comments section of blog posts.