Tiered link building helps you grow quality backlinks in two steps. First, you...

https://www.4shared.com/office/BIObF2h6fa/pdf-72309-44204.html

Tiered link building helps you grow quality backlinks in two steps. First, you build strong, relevant Tier 1 links that point directly to your site. Then, you support those links with Tier 2 links to boost their authority