Check out my courses Learn Dialogflow ES and Learn Dialogflow CX if you would like to learn Dialogflow in depth.
If you are getting started with Dialogflow ES, the mindmap can help you get a 360 degree overview of Dialogflow. You can also download it in mindmap format and then open it using Mindomo. This will allow you to edit the map/ add your own notes/ drill down into individual branches etc.
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"The magic key I needed as a non-programmer" The custom payload generator was the magic key I needed (as a non-programmer) to build a good demo with rich responses in DialogFlow Messenger. I've only used it for 30 minutes and am thrilled. I've spent hours trying to figure out some of the intricacies of DialogFlow on my own. Over and over, I kept coming back to Aravind's tutorials available on-line. I trust the other functionalities I learn to use in the app will save me additional time and heartburn. - Kathleen R Cofounder, gathrHealth