Help CenterThis is probably one of the trickier things to do and learn, but with taking some time to learn, you can become a master at it like Neil is.
We have many places to learn about this more in many places.
You can watch these video's "Book Bolt Webinar - Research, Covers, Keywords, Listings " or this one "Book Bolt Webinar - KDP Research For Low Competition Niches", they are longer but very valuable as well.
If you watch the Weekly Calls that Neil puts on, he always finds a Low Content Niche of the week. We have put together an ongoing article, that shows these short clips taken from each Weekly Call. They can range 1 minute to 5 minutes in length approximately. You can view the article found in the Knowledge Base under KDP Research. It is called, "Low Content Niche of the Week (How to Find Niche's)". When you click each link, the YouTube window opens and only plays the part about the Low Content Niche of the Week. Watching many of these you can learn quickly that it can become fairly easy to find Niche's in a short period of time.
In the Blog Section we have a whole category that "KDP Research". There is a wide variety of articles there including some about niche's.
We also have a section in this Knowledge Base called "KDP Research" that has a few articles about Niche's.