One of my recent projects at the Turing school, Sweater Weather, is a local API that takes map and directions data from MapQuest + MapQuest Geocoding, plus weather data from OpenWeather, and tells a requester what conditions to expect at their time of arrival.
I was curious about Flows in Postman, so I decided to give them a shot with my homebuilt API - specifically to see if the weather was sufficiently sunny to go forward with the trip plan, or "abandon trip."
Flows is essentially a way to daisychain API requests together, and add conditional or reactionary steps based on the data from each. It's a low-code solution, enabling folks who are less familiar with javascript to configure requests in sequence and manipulate and sort results.
(Many thanks to Beth at Beth's Testing Blog for the primer which helped my early understanding of the tool!)