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

https://www.golf-bookmarks.win/this-article-breaks-down-tiered-link-building-in-simple-terms-it-explains-how

Tiered link building uses two levels of links to boost your site’s authority. Tier 1 links point straight to your site, while Tier 2 links support those Tier 1 links. This approach helps improve your rankings safely and steadily