Yes, the demo only shows the possibilities and please check our knowledge base for the theme features and how to utilize them. It would require familiarization of the features to create your desired design, especially if you're trying to follow a design from our demo.
The demo import doesn't have any instruction on how to edit or create them, it's simply a demo import where users can use as their starting point.
When I go to the "Validation section" it does not tell me HOW to implement the actual demo design or what it actually looks like.
Please check the article provided by Jade for setting up the demo, I'm providing it here again in case it's not clickable on your end https://theme.co/apex/forum/t/setup-demo-content/56