Tiered link building is all about passing authority efficiently. You focus your...

https://www.scribd.com/document/1032066985/Why-Are-My-Rankings-Not-Moving-After-Building-Backlinks-A-Troubleshooting-Guide-163537

Tiered link building is all about passing authority efficiently. You focus your high-quality Tier 1 links directly at your main site, then use Tier 2 links to boost the power of those pages