Tiered link building boosts your website’s authority by using multiple layers...

https://extra-wiki.win/index.php/How_Do_I_Disavow_Harmful_Backlinks_Without_Panicking%3F

Tiered link building boosts your website’s authority by using multiple layers of backlinks. Tier 1 links point directly to your site, while Tier 2 links support those Tier 1 sources