Tiered link building uses two levels of backlinks to boost your site’s...

https://www.last-bookmarks.win/tiered-link-building-helps-you-squeeze-authority-from-every-backlink-learn-to

Tiered link building uses two levels of backlinks to boost your site’s authority. Tier 1 links point directly to your website, providing strong, high-quality signals. Tier 2 links support those Tier 1 links by linking to them, helping increase their power