Writing a comment on Uber is done during the rating process immediately after your trip ends. Once the ride is complete, the app prompts you to rate your driver from 1 to 5 stars. After you select the star rating, a "Leave a comment" or "Add a note" box usually appears, allowing you to provide specific feedback. These comments are helpful for praising a driver's navigation and cleanliness or reporting an issue like a reckless maneuver or an unprofessional interaction. If you missed the chance to comment right after the ride, you can go into your "Activity" or "Your Trips" menu, select the specific ride, and look for the "Rate or tip" or "Get Help" section to leave feedback. Note that for safety and privacy reasons, Uber often anonymizes comments before sharing them with the driver, so they won't necessarily know exactly which passenger wrote the feedback unless the detail makes it obvious.