Tiered link building uses two levels of backlinks to boost your site’s...

https://wiki-saloon.win/index.php/Can_I_Do_Tiered_Link_Building_Myself_or_Do_I_Need_an_Agency%3F

Tiered link building uses two levels of backlinks to boost your site’s authority. Tier 1 links point directly to your site from high-quality sources. Tier 2 links support those Tier 1 backlinks, helping them rank better and pass more value