BookBub is hard to describe - it's kind of like Reedsy Discovery, but also kind of like Goodreads, and even a little bit like Wattpad. However, it's not social media book publishing. Your book needs to be commercially available to be on BookBub.

BookBub lets its members leave reviews. So far, mine have been five-star reviews (all two of them, admittedly, but FIVE STARS).