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

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

Tiered link building uses two levels of links to boost your site's SEO. Tier 1 links point directly to your pages and are usually high-quality and relevant