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

https://www.slideserve.com/richard_russell21/what-should-i-use-for-tier-1-links-if-i-want-to-rank-a-landing-page

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