Just read through a great website:
https://smartblogger.com/what-readers-want/
"The Surprisingly Simple Secret to Knowing What Your Readers Want"
From the viewpoint of a blogger, figuring out what kind of blog-entries (or really anything else) is of interest to your audience. In a nutshell, how to mine self-created surveys.
The surprisingly simple secret to knowing what your readers want (Blog-related)
How to use surveys