Keep a simple reading log of finished books and write a short, honest recommendation for one of them.
A reading log is a simple list of the books you have read, with a short note about each one. It helps you remember what you read and notice your own reading habits over time.
A recommendation tells someone else why they might enjoy a book too -- your honest opinion plus a real reason.
Mastery looks like: They maintain a reading log with real titles and notes, and write a genuine recommendation with a supporting reason.
Common stumbles: Giving a rating with no reason attached, which does not help anyone else decide whether to read the book.