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

https://landensinsightfulperspectives.wpsuo.com/how-do-i-explain-tiered-link-building-to-a-client-without-jargon

Tiered link building uses two levels of backlinks to boost your site’s ranking. Tier 1 links point directly to your pages, driving real traffic and building authority. Tier 2 links support Tier 1 by linking to those backlinks, making them stronger