I will 200 Unique Domain Backlinks DA 20+ In the world of SEO, Blog commenting is the most powerful link building process without fail. And, There was a time when SEO was at a nascent stage and primary metrics such as Google Page Rank mattered a lot in SEO. Today, SEO has advanced far beyond the domain of Page Rank and as such, secondary metrics such as trust flow, domain authority, citation flow etc., have taken over Page Rank in terms of importance as far as ranking is concerned. Key Features: THANKS