The type of comments you permit speaks volumes about you, and precisely the same goes for guests leaving comments on your blog. NoFollow back links from blog commenting serve as an indicator to search engines like google that the hyperlink shouldn’t impact the joined website’s ranking. But, they’re not ineffective. https://www.seobyaxy.com/blog/do-follow-backlinks-websites-list-discover-the-top-100-websites-with-high-pr/