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

https://www.foxtrot-bookmarks.win/tiered-link-building-is-a-strategy-that-helps-boost-your-site-s-ranking-by

Tiered link building uses two levels of backlinks to boost your site’s authority. Tier 1 links point directly to your site and have the most impact. Tier 2 links support those Tier 1 links, making them stronger and safer