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Well, in order to improve the edge, it has to have some abrasive quality. I would want to know, what that is and what size the abrasive.

There are many good micro abrasives out now, that are...

Does it do, anything?

Sounds like the seller does not know what it is. Folks strop on all kinds of abrasives, some work for razors, most don’t.

What is it pasted with?

There are various weaves of microfiber, some work well as a pasted nano -grit strop. The smoother weaves work better than the long thread, towel/cleaning type microfiber.