Tiered link building helps you build a strong backlink profile by layering...

https://station-wiki.win/index.php/What_Kind_of_Content_Earns_Backlinks_Fastest:_How-To_vs_Case_Study_vs_Infographic%3F

Tiered link building helps you build a strong backlink profile by layering links. Tier 1 are your main backlinks pointing directly to your site. Tier 2 links support Tier 1 by linking to those first-tier pages