Tiered link building boosts your site’s authority by using two levels of links....

https://www.foxtrot-bookmarks.win/tiered-link-building-scales-authority-send-high-quality-tier-1-links-to-your

Tiered link building boosts your site’s authority by using two levels of links. Tier 1 links point directly to your site and should be high quality. Tier 2 links support those Tier 1 pages, making them stronger in search rankings