Workflow Manager is an external system to SharePoint Server, but is leveraged for advanced workflows created through SharePoint Designer 2013 or Visual Studio. Workflow Manager is designed to run in a separate Workflow Manager “farm,” although it can be colocated on SharePoint.
Initial Setup
In our topology design, Workflow Manager 1.0 will be installed on LSWFM01, LSWFM02, and LSWFM03 for a highly available farm. Workflow Manager supports an architecture of one or three servers in a Workflow Manager farm. ...