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

https://abigailsultimatecolumns.lowescouponn.com/what-s-a-good-tier-1-link-guest-post-vs-niche-edit-vs-pr-mention

Tiered link building helps boost your website’s authority by creating two levels of backlinks. Tier 1 links point directly to your site, while Tier 2 links support those Tier 1 links