Facebook asks users to rate things they've read, watched

Facebook has been pushing for users to add more content to their timelines, indicating shows they’ve watched, movies they’ve seen, and books they’ve read. This information is then added to modules on the left side of the timeline.

Now, the site wants to know how well users liked those things. Some users started seeing prompts on the sidebar of their  to rate these items on a star scale.

This appears to be a way to push more recommendations into the system.