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

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

Tiered link building uses two levels of backlinks to boost your website’s ranking. Tier 1 links point directly to your site and carry the most weight. Tier 2 links support those Tier 1 links, making them stronger and more credible