I believe he used one of those marketing phrase generators when he came up with this response.

Well designed .js based, interactive link analysis functionality capable of taking feed of external data and showing links and relationships between nodes in a way that does not look like a mess on the screen.

Don't confuse it with Google page links to each other. It's not about SEO. It's about having an ability to visualize relationships between entities.

(A)->(B)->(C)

      |

      v   

     (D)->(E)

None of D3.js can do it properly