Tiered link building helps improve your website’s authority by creating strong...

https://www.apu-bookmarks.win/tier-1-links-are-your-direct-authority-boosters-while-tier-2-links-help-them

Tiered link building helps improve your website’s authority by creating strong links in two layers. Tier 1 links point directly to your site, while Tier 2 links support those Tier 1 links to boost their power