Slides & Checklist Here: http://digitaltriggers.io/wp-content/uploads/2015/10/PBN-Footprint-Checklist.pdf
WTF is a footprint?
Simply; a unique identifier for your PBNs
Something used to link your PBNs together
Plugin, theme, linking whois, SOA records, outbound linking patterns
There’s No Such Thing As NO Footprint.
Our Goal= Minimize The Footprint
While something can be a footprint, it is not harmful if it’s used by thousands, tens of thousands or even millions of other (legitimate) blogs. This goes goes for plugins, themes, WordPress itself and anything else that is used on mass scale on the Internet.