I remember having questions about what to post on my writer page on Facebook when I first set it up. For all the other writers and authors out there who are preparing to create or have just recently started a Facebook page for themselves or their book, I think you’ll find Katie Bolin’s blog post, “Facebook Page vs Profile: Know the Difference,” to be helpful (https://www.millcitypress.net/blog/facebook-author-page-vs-profile?utm_source=Weekly%20MCP%20Email&utm_medium=email&utm_campaign=FBPageProfile). In her article, she writes about the differences between Facebook profile and a Facebook page. She also lists the pros and cons of advertising your book through each venue.
Happy writing and good luck with your Facebook pages!