Tiered link building passes authority from support pages to your main site....

https://www.bookmark-belt.win/tiered-link-building-creates-a-solid-foundation-for-your-site-you-secure

Tiered link building passes authority from support pages to your main site. Learn to build Tier 1 links to your domain and use Tier 2 links to boost those pages. With Ahrefs, you can track this structure effectively