Google introduced two new link attributes (rel=”sponsored” and rel=”ugc”) that provide webmasters with additional ways to help Google understand the nature of links
Use the sponsored attribute to identify links on your site that were created as part of advertisements, sponsorships or other compensation agreements.
UGC stands for User Generated Content, and the ugc attribute value is recommended for links within user generated content, such as comments and forum posts.
Use this attribute for cases where you want to link to a page but don’t want to imply any type of endorsement, including passing along ranking credit to another page.
No. If you use nofollow now as a way to block sponsored links, or to signify that you don’t vouch for a page you link to, that will continue to be supported. There’s absolutely no need to change any nofollow links that you already have.
Yes. If you want to avoid a possible link scheme action, use rel=“sponsored” or rel=“nofollow” to flag these links. We prefer the use of “sponsored,” but either is fine and will be treated the same, for this purpose.