Notes & Catalog Revisions
Here is where you'll see any notes that have been made to a product (e.g. "great for running".) Notes also have their own filter option as well.
This also houses any catalog revisions that have been made to the catalog post-printing, to give the users the most up-to-date product information possible.
Ratings are used for highlighting products that you like and want to earmark for future reference, usually for ordering purposes. Ratings have been built into the Filters function, so you can easily find your favorite products.