One of the best things about the Book Review plugin is that it can save you a substantial amount of time. It does this by automatically filling out information such as title, author and genre, and will even bring in an image of the book’s cover! The plugin eliminates all of the copying and pasting you used to do, and is especially handy if you write a lot of reviews.
However, the process of generating a Google API key can be somewhat confusing. While there is documentation available that walks you through how to do it, I’ve also put together a video that further illustrates the process. The video covers how to move around in the Google Developers Console, what to enter into the Google API Key field of the Book Review Settings, and what you need to do in order to automatically populate the details of a book.
Hopefully this video will help to eliminate any pain points you may be experiencing; however, if you still have questions after watching it and reviewing the documentation, feel free to post them in the General Support forum.
You can also watch this video directly on Youtube.