Tiered link building is about smart architecture, not spam. Learn to drive...

https://future-wiki.win/index.php/How_to_Find_High_Authority_Domains_in_Your_Niche_Without_Paying_for_Tools

Tiered link building is about smart architecture, not spam. Learn to drive authority by connecting quality tier 1 links to your pages, using tier 2 links to boost their impact. We show how to map these connections in Ahrefs for steady, measurable results.