Tiered link building boosts your site’s authority by creating two layers of...

https://www.alphabookmarks.win/tiered-link-building-organizes-backlinks-into-two-groups-tier-1-links-point

Tiered link building boosts your site’s authority by creating two layers of backlinks. Tier 1 links point directly to your site with high quality and relevance. Tier 2 links support those Tier 1 backlinks, making them stronger and more effective