Tiered link building focuses on creating strong Tier 1 links that point...

https://atomic-wiki.win/index.php/What%E2%80%99s_the_Best_Way_to_Track_New_Backlinks_After_Outreach%3F

Tiered link building focuses on creating strong Tier 1 links that point directly to your site. Then, you build Tier 2 links to support those Tier 1 links, making them more powerful and trustworthy