Tiered link building breaks your outreach into layers. Tier 1 links point...

https://high-wiki.win/index.php/What_is_Tiered_Link_Building_in_SEO_and_Is_It_Safe%3F

Tiered link building breaks your outreach into layers. Tier 1 links point directly to your site and have the most value. Tier 2 links support Tier 1 pages, boosting their strength and helping your site rank higher