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

https://www.golf-bookmarks.win/tiered-link-building-gives-you-control-by-pointing-tier-1-links-at-your-site

Tiered link building uses two levels of links to boost your site’s authority. Tier 1 links point directly to your website, while Tier 2 links support those Tier 1 links, making them stronger