When you click the Run button in order to start the workflow run, if your workflow requires inputs - a Run workflow dialog will pop up to allow you to supply inputs values for your workflow before you run it.
It is composed of:
Contains a small preview diagram of the workflow you want to run.
Contains a description of the workflow (if provided); details of what you can describe and what can be find in the Annotations section.
Name of the author(s) of the workflow. Details on how to add author name can be found in the Annotations section.
Each workflow input is represented by a separate tab. This is where you supply your input values.
Contains the description of the selected input. Details on how to add description to selected workflow input can be found in the Annotations section.
Contains example values of the selected input. To find out how to add an example value see the Example values section.
The input you supply can be a value, a file location or a URL.