User-Generated Content (UGC) encompasses everything that customers or users publish about a company. The company has little or no direct involvement in the creation of this content.
Common forms of user-generated content include reviews, testimonials, photos, videos, social media posts, comments, forum posts, and use cases.
The difference from traditional marketing lies in the source. It is not the company speaking about itself, but an independent individual. This lends the content a credibility that traditional self-promotion struggles to achieve.