The back stamp on the bottom of pottery can identify where it was made, it’s country of origin, and sometimes indicate what it’s worth, although sometimes people fake the marks to try and con people thinking a cheap teacup or vase is worth more, sometimes a lot more, than it actually is.
This happens in pottery manufacture across the globe. A Ming dynasty vase might have been made last week, a Delpht plate might have been made somewhere in Britain..
The thing is an inanimate lump of clay can be transformed into something delicately shaped and beautifully glazed or enamelled. People want to know it they are looking at a Clarice Cliff or a Susie Cooper. That’s part of the reason they look. But also if you live in a pottery manufacturing town you want to tell the difference between them. And the turn over can be enlightening!