Tiered link building helps boost your website’s authority by creating different...

https://www.slideserve.com/richard_russell21/what-should-i-use-for-tier-1-links-if-i-want-to-rank-a-landing-page

Tiered link building helps boost your website’s authority by creating different layers of backlinks. Tier 1 links point directly to your site for strong, high-quality signals