How Google’s Nofollow, Sponsored, & UGC Links Impact SEO

Artículo del blog de moz.com sobre los atributos de los enlaces (rel= ) y el cambio que va a realizar Google respecto a nofollow (parece ser que todavía no está claro): “Google shook up the SEO world by announcing big changes to how publishers should mark nofollow links. The changes — while beneficial to help Google understand the web — nonetheless caused confusion and raised a number of questions. We’ve got the answers to many of your questions here“.
https://moz.com/blog/nofollow-sponsored-ugc