What you know about PBN?

[SEO.Ninja]

Is this a black hat technique or advance type of white hat?

[harrywood]

A PBN is a network of websites used to build links (and therefore pass authority) to a single website for the purpose of manipulating search engine rankings. This scheme is similar to a link wheel or link pyramid.
Thanks for this post.

[SEOTechniques]

A Private Blog Network (PBN) is a network of authoritative websites used to build links to your money website(s) for the purpose of ranking higher in the Google search engine. A money website is a website you intend on ranking i.e. the one that actually makes money. This can also refer to a clients website.

I believe PBN is Grey Hat.

[ryanchapman]

A PBN is a network of websites used to build links (and therefore pass authority) to a single website for the purpose of manipulating search engine rankings. This scheme is similar to a link wheel or link pyramid, as it involves several different websites all linking to one another or to one central website.

[Armando Gardner]

PBN, It stands for "Private blogging network". Basically, PBN is used in the link building process where world limit should lies between 400 to 405 and content should be unique having a definite meaning.