What is it

[john291]

Gallery App and Group Sharing App (or Samsung Experience Service App) 

[Ry-Galaxy]

Gallery App is where you can see all your photos and videos.

Group Sharing App is a system app that allows you to share photos and videos to your contacts.

[john291]

Thanks

[JAMES4578]

@john291   some advice on using the Gallery App here https://www.samsung.com/uk/support/mobile-devices/how-do-i-use-the-gallery-app/ A bit more detail about the Group sharing in a post from our Community Lead https://eu.community.samsung.com/t5/mobile-apps-services/tips-learn-

The latest version of Group  Sharing( version 3.1.11.23)  with 5.1 update incorporates the Invite With A Link feature.  see some information here https://www.sammobile.com/news/samsung-group-sharing-update-invite-links-child-accounts/