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. Start with Tier 1 links that point directly to your site for strong, high-quality backlinks