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

https://www.kilobookmarks.win/tiered-link-building-helps-you-focus-authority-where-it-matters-most-by-using

Tiered link building uses two levels of backlinks to boost your site’s authority. Tier 1 links point directly to your site, while Tier 2 links support those Tier 1 backlinks