Hey all - I have very recently gotten into Amazon Affiliate Niche sites and have my first one built. I'm now trying to figure out how to start building backlinks. I've done a lot of searching and have read many guides but I can't find some basic definitions. Can someone explain what Tier 1, 2 and 3 are? Am I supposed to build multiple different web properties? So my Tier 3 properties would link to my Tier 2 which would link to my Tier 1 which would link to my actual site - is that correct? Also what exactly is a PBN? Thanks!