This article explains tiered link building, where Tier 1 links point directly...

https://www.active-bookmarks.win/stop-wasting-time-on-weak-backlinks-learn-how-to-structure-tier-1-links-to

This article explains tiered link building, where Tier 1 links point directly to your site for strong SEO impact. Tier 2 links support those Tier 1 links, boosting their power and helping your rankings grow steadily