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

https://bizzmarkblog.com/tiered-link-building-campaign-checklist-a-week-by-week-guide/

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