What a passer-by does in front of a shop window screen
They stop because the image moves. They watch two or three slides, wait for the one they care about to come back round, then walk on. The screen held their attention for a minute without letting them do anything with it.
It is even clearer in the evening. The street is quiet, the shop is dark, the screen stays on until 10 pm. There are never so many people with time to read your window, and never so few ways to reach you.