Apple introduced the monitor halfway through the lifespan of the II series.
Many home users of Apple II computers used televisions as computer monitors before the Monitor II.
This allows users to adjust the viewing angle up or down without the addition of a tilt-and-swivel device.
The Monitor II was widely adjustable for the time, including adjustments for the size and location of the image on the screen.
You can help Wikipedia by expanding it.This article about Apple Inc. is a stub.