Tiered link building helps you grow your site's authority by creating two...

https://www.bookmark-zulu.win/tiered-link-building-creates-a-controlled-flow-of-authority-by-layering

Tiered link building helps you grow your site's authority by creating two levels of backlinks. Tier 1 links point directly to your site, boosting its ranking. Tier 2 links support those Tier 1 links, making them stronger and more effective