The Android 7.0 Nougat for the Galaxy J7 (2016) brings a newer user interface similar to the one found in the Galaxy S8, a slightly different version of Multi Window mode, enhanced notifications, Samsung Pass, and improved UI functionality.
If you haven't received the update yet, Just go into the settings, Software update, and then hit the Download updates manually button.
Samsung recommends to use a Wi-Fi connection for downloading Software updates. Got the latest update? Let us know in the below comment section.