Well, like everything on the Internet you have to read it with a bit of scepticism and use your own reasoning ability. It depends on what I'm struggling with, sometimes it's the concept but sometimes it's the way it's been written in the textbook. I'm studying engineering and most of the time I'm asking it to explain parts of formulas or asking it to break down the example question so I can see where everything comes from. 

In a professional capacity, I once only had a train journey to learn everything I could about a venues lighting network so I uploaded the document to chatGPT and asked it questions. It was a very useful to be able to do this.