As a monochrome technique, charcoal is best suited for high-contrast images and, of course, for black or black and white animals.

The drawing is built up in several layers, with the dark areas gradually being blackened. Light areas are created by leaving out the white paper, or by erasing from tinted areas.

So the eraser is not only used for correction, it is also a consciously used drawing instrument.
I have erasers in various forms, e.g. eraser pencils, in order to depict fine hair, for example.

Like pastel drawings, charcoal drawings are sensitive to bluring, despite I'm using a little bit of fixative on my charcoal drawings.
They also have to be framed behind glas with a mount / passepartout.

For charcoal drawings you use slightly rough drawing papers. In recent years I have been using a relatively smooth paper by Daler Rowney, which allows the depiction of fine details.

This is my drawing material:

Here you can see some examples of my charcoal drawings.

 
Of course, it also works the other way round:
Very impressive monochrome drawings can be created with white charcoal and pastel pencils on black drawing paper.
This technique is well suited for high-contrast images and, of course, for black animals.