We've put together a Maestro overview video introducing you to Maestro for Drupal 8.  Maestro is a workflow engine that allows you to create and automate a sequence of tasks representing any business process. Our business workflow engine has existed in various forms since 2003 and through many years of refinements, it was released for Drupal 7 in 2010. 

If it can be flow-charted, then it can be automated

Now, with the significant updates for Drupal 8, maestro was has been rewritten to take advantage of the Drupal 8 core improvements and module development best practices. Maestro now provides a tighter integration with native views and entity support.

Maestro is a solution to automate business workflow which typically include the movement of documents or forms for editing and review/approval. A business process that would require conditional tests - ie: IF this Then that.