Tiered link building uses two levels of links to boost your site’s SEO. Tier 1...

https://highstylife.com/how-do-i-tell-if-a-backlink-is-relevant-or-just-high-da-fluff/

Tiered link building uses two levels of links to boost your site’s SEO. Tier 1 links point directly to your main pages and carry the most weight. Tier 2 links support Tier 1 by linking to those first-level pages