The “UGC” Attribute tags back links from person-created content, when the “Sponsored” attribute tags inbound links from sponsored or paid resources. These attributes are a little bit distinct compared to nofollow tag, but they primarily function the same way, allowing Google know these links aren’t reliable or endorsed from https://www.seobyaxy.com/blog/what-are-the-5-major-channels-for-site-traffic/