If You have a small Arduino project, You do not always want to connect the device to the serial monitor.
There are the rather bulky LCD displays, concerning the model 2004 16 x 4 it is rather expensive.
So why not try it with an OLED display? There are two formats of OLED displays and I have tested them both.
The first one has 32 lines, the other twice as much.

So You are better off with the 128×64 OLED because with smaller characters You can display up to four rows and You do not need the serial monitor.