Tiered link building boosts your site's authority by creating two levels of...

https://www.ready-bookmarks.win/tiered-link-building-boosts-your-website-s-authority-by-using-multiple-layers

Tiered link building boosts your site's authority by creating two levels of backlinks. Tier 1 links point directly to your site and come from high-quality sources. Tier 2 links support those Tier 1 links, strengthening their value