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

https://www.emergbook.win/tiered-link-building-uses-two-levels-of-backlinks-to-boost-your-site-s-1

Tiered link building helps boost your website’s authority by creating two levels of backlinks. Tier 1 links point directly to your site and are high quality. Tier 2 links support your Tier 1 links, making them stronger and more effective