There are a few things you can do to find out who likes a Facebook page.

  1. Look at the posts that people make. This will give you a good indication of who is interested in what the page is doing.
  2. Check out the pages that people follow. This will give you an idea of what kind of content they are interested in.
  3. Check out the groups that people are part of. This will give you an idea of what kind of topics they are interested in.