PBN (Private Blog Network) link used to be called a high PR backlink or PR link back in the day. This term is no longer being used because they stopped showing PR publicly. They are of course still using it as part of their algorithm in private. Learn more about PBNs on our blog.
Why buying high PR or PBN backlinks is so effective?
Private Blog Network links are exactly what search algorithm wants! They have authority, trust, and power! The most powerful link on the planet. Not to mention the fact that you have full control over them!