When we  begin to build more complex workflows inside of Make, something which helps  us manage our data and where it goes, if Flow Control.    Flow Control is made up of the following key components    - Iterators    - Aggregators    - Filters    - Branches and Routers    - Functions    I run through exactly how to use each one of these components and how in  practical use they are beneficial to your workflows.    We are covering the technical fundamentals here so, before you progress,  take a minute out to build a few test scenarios using these functions, to  learn how they work, and then head onto building the scenarios alongside us.