Tiered link building uses two levels: Tier 1 links point directly to your site,...

https://wiki-spirit.win/index.php/Do_Social_Media_Links_Help_SEO_or_Is_It_Just_Traffic%3F

Tiered link building uses two levels: Tier 1 links point directly to your site, boosting authority right away. Tier 2 links support Tier 1 by linking to those pages, making them stronger and more credible