Updated: Mar 18, 2019
In this article you will see how to install Workflow Manager 1.0 for SharePoint 2013.
In SharePoint 2013, Workflow Manager must be downloaded and installed separately. By default Workflow Manager will not be installed when you install SharePoint 2013 whereas in SharePoint 2010 the workflow engine is installed automatically when you install the SharePoint 2010 product. If you don't install Workflow Manager 1.0 for SharePoint 2013 then you will be able to create only SharePoint 2010 workflows.