Tiered link building uses two levels of links to boost your website’s ranking....

https://dibz.me/blog/strategic-insights-crafting-an-effective-tiered-link-building-campaign-959

Tiered link building uses two levels of links to boost your website’s ranking. Tier 1 links point directly to your site and are high quality. Tier 2 links support Tier 1 links, helping to strengthen their impact