Flow in a Flow is a way for you to bring a Flow that has only specific type of contents in it, inside another Flow. This is useful for displaying company-wide and location-specific information on the same screens.
Most common use cases to use the Flow in a Flow Feature
If you have a use case specific Flow, e.g. EHS Flow that needs to be seen in all Displays and a location specific Flow that is directed to a specific Display, you can put the more generic Flow inside the location specific Flow for easier management.
How to use the Flow in a Flow Feature
First you need two Flows, one for a wider audience, and one for e.g. to be used in a specific location.
Choose the location specific Flow and click to open.
Then add the second Flow, set the weight and SAVE as you would with a Content App.
More detailed instructions can be found in the article Create a Flow - a fully automated content playlist