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

https://www.web-bookmarks.win/this-article-breaks-down-tiered-link-building-explaining-how-tier-1-links

Tiered link building uses two levels of backlinks to boost your site’s authority. Tier 1 links point directly to your site and carry the most value. Tier 2 links support Tier 1 by linking to those backlinks, helping to strengthen their power