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

https://paxtonsnewdigest.iamarrows.com/agency-link-building-vs-diy-what-do-you-really-pay-for

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