Before we are going to use Validator, Condition and Post functions let me example the differences with a few examples as this subject is very important to understand. 

In this lesson, I will explain to you what is the difference between Validator and Condition. Next, I will show you few Real-Life examples

Now let's do a few interesting examples with Screens. I will show you how to request a field from a screen

Now you know how to use Validators so let's move on to Conditions. I will show you how to set Due Date and a few more real-life examples of Condition usage. 

Post functions are very powerful and can add a lot of automation to our workflow. I will show you a few examples including resolution and issue update field

In this short lesson, I will show you how to move workflows between Jira instances or how to use the same Workflow in another project.