Tiered link building helps you grow your website’s authority step by step....

https://seo.edu.rs/blog/how-do-i-build-tier-2-content-that-looks-natural-and-not-forced-11162

Tiered link building helps you grow your website’s authority step by step. First, Tier 1 links point directly to your site to boost rankings. Then, Tier 2 links support those Tier 1 links, making them stronger and more natural