What is a workflow?

Workflows are ways of grouping documents together and defining them to flow in specific ways for export integration which can be set based on on a Workflow Rule 
 
A Workflow Rule is anchored on the document type and a Tag associated to an export integration,  <docType>-<Tag>-<Export integration>.
For example,
    • Invoice (Purchases) - Purchase - Google Sheets is one workflow
    • Invoice (Purchases) - Sales - Google Sheets is another workflow