This tutorial video will show you step by step how to completely disable Flipboard Briefing on a Samsung Galaxy.
This tutorial works for all Samsung Galaxy phones running Android 7 and 8, such as the S6, S6 Edge, S7, S7 Edge, S8, S8 Edge, S8 Plus, Note 8, S9, S9 Plus, Note 9, J3 (+ Pro), J4 (+ Pro), J5 (+ Pro), J6 (+ Pro), J7 (+ Pro), A3, A4, A5, A6, A7, A8, A9, and all other Samsung Galaxy phones running Android 7 (Nougat) and Android 8 (Oreo).
Flipboard Briefing provides a summary of personalized news. You can quickly open it by swiping left on your home screen. You cannot uninstall it, but you can disable it.