Have just added node to database and the next step in the document is Create the buddy projection which again I do not know what this is.
The buddy projection is what sets up k-safety to allow a single node to become a vertica cluster.
Release : 3.7
Component : IM storage
This step is only needed if you are going from one node to multiple.
Since a multiple node cluster already has k-safety set to one, this is not needed if adding an additional node to a multi-node cluster.