"Would you like to come up and see my etchings?" is a question that should always be answered carefully. But not - as here - if the questioner would really does have some etchings.
Strictly speaking, though, this is a drypoint only one of various type of etchings. In days of yore - that is before the late 20th century - etching was the only real way you could reliably reproduce drawings, paintings or photographs.
Etching is not something you can readily take on in your own home and to do so safely requires special equipment and instruction. But for those who wish to learn a little more about the basics, then just click here.