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

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 two levels of backlinks. Tier 1 links point directly to your site from high-quality sources, while Tier 2 links support those Tier 1 pages