User generated content (UGC) refers to content that is published by ordinary users on the web. UGC has evolved the internet, starting with limited Web 1.0 to the diverse and specialized content of Web 2.0 where users have more autonomy. UGC now accounts for 360 billion pieces of content per year and influences 70-80% of purchase decisions. Marketers should focus on building communities, discussion platforms, and supporting user causes to effectively leverage UGC. The future of UGC, called Web 3.0, will focus on rewarding content producers for their contributions.