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

https://www.logo-bookmarks.win/this-article-explains-how-tiered-link-building-works-by-focusing-on-two-groups

Tiered link building uses two levels of backlinks to boost your site's authority. Tier 1 links point directly to your site and carry the most value. Tier 2 links support those Tier 1 pages, helping them rank higher