Tiered link building is all about creating a smart hierarchy to boost your...

https://zandersnewperspectives.lucialpiazzale.com/how-to-plan-a-tiered-link-building-campaign-for-one-landing-page

Tiered link building is all about creating a smart hierarchy to boost your domain authority. You focus on building high-quality Tier 1 links directly to your site and then use Tier 2 links to power up those pages