The “UGC” Attribute tags back links from consumer-generated content, when the “Sponsored” attribute tags links from sponsored or paid resources. These characteristics are a bit diverse compared to nofollow tag, but they primarily function exactly the same way, letting Google know these inbound links aren’t trustworthy or endorsed through https://www.seobyaxy.com/blog/how-can-i-generate-backlinks-for-my-website/