Tiered link building boosts your site's authority by building links in layers....

https://uniform-wiki.win/index.php/What%E2%80%99s_a_Good_Monthly_Routine_for_Backlink_Audits_and_Cleanup%3F

Tiered link building boosts your site's authority by building links in layers. Start with Tier 1 links from trusted, relevant sites that point directly to your page. Then, support those with Tier 2 links that strengthen your Tier 1 sources