Tiered link building helps boost your website’s authority by creating two...

https://station-wiki.win/index.php/How_Do_I_Build_Tier_2_Content_That_Looks_Natural_and_Not_Forced%3F

Tiered link building helps boost your website’s authority by creating two levels of backlinks. Tier 1 links point directly to your site from high-quality sources, while Tier 2 links support those Tier 1 pages