What is Workflow?

Workflow is a sequence of steps which have to be followed in order as it is an operation/organization for stuff to follow in a  sequence.
Workflow may be seen to control situations. Workflow can be described as a document that is being transferred from one step to another.
A workflow is a pattern of activity which is control by a systematic organization of resources, defined in roles and mass, energy and information flows, into a work process that can be documented and learned.
Workflow is designed to achieve processing of work and to make sure that it is done in the correct order and so that everything gets done.