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

https://web-wiki.win/index.php/What_Anchor_Text_Should_I_Use_for_Tier_1_Links_Without_Overdoing_It%3F

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