As explained by Mayer, the app aims to help people easily create and share photos of trips, parties, or hangouts with friends. Shine does this by creating shared albums, to which you and others can add photos in their original resolution. If you’re too lazy to go through the photos you’ve taken to decide which ones you want to upload, you can turn on the app’s AI-powered “Manual Mode.”
https://gizmodo.com/marissa-mayer-new-app-shine-photo-sharing-yahoo-design-1851368662