Tiered link building boosts your site's authority by creating two levels of...

https://www.mediafire.com/file/z9mgvqdwwo1eb8a/pdf-42897-77316.pdf/file

Tiered link building boosts your site's authority by creating two levels of backlinks. Tier 1 links point directly to your site and come from high-quality sources. Tier 2 links support those Tier 1 links, strengthening their value