1. For the mobile app products that I like, I would choose Spotify, Instagram, and Airbnb. 2. Out of these three, I would choose Spotify. I think it is a great product because of its user-friendly interface, personalized recommendations, and extensive library of music. The use cases for Spotify are vast, ranging from users who want to discover new music to those who want to create playlists for specific moods or activities. Its competitors include Apple Music and Tidal, but Spotify has a larger user base and more extensive music library. One potential improvement for Spotify could be to include more social features, such as the ability to share playlists with friends or see what others are listening to. This would help to increase user engagement and retention. To prioritize this improvement, I would look at the number of users who have suggested this feature, as well as the potential impact on user engagement and revenue. 3. For the mobile app products that I dislike, I would choose TikTok, Snapchat, and Yelp. 4. Out of these three, I would choose Yelp. While Yelp is a useful tool for finding local businesses, I find the app's interface to be cluttered and difficult to navigate. One potential improvement for Yelp could be to simplify the app's design to make it easier for users to find the information they need quickly. To prioritize this improvement, I would look at user feedback regarding the app's usability and the impact that a more user-friendly interface could have on user engagement and retention. Additionally, I would look at metrics such as the number of users who abandon the app before finding the information they need.