(LibGdx) Screen or states?

I’ve started using LibGdx which is quite hard for me to grasp especially since I’m a beginner.
I’ve been reading different variety of resources trying to understand what is the difference between Screen and State in LibGdx.
From my point of understanding the State manager handles all different type of state like splash state, menu state and play state while Screen handles splash screen, menu screen and play screen.
From every tutorial I’ve watched and read they either use Screen or State. Should I choose Screen or State which is better? (sorry for my English)