Swapping your artwork on HEN is the best because your swap will be available on all platforms (HEN, OBJKT.COM, Henext, etc). But when HEN is down for any reason, what to do ? Some artists do swap then on objkt.com, but then the swap is only visible there. And when HEN come back, then you have to unswap/reswap on HEN if you want to be visible on HEN.
This tool allow you to swap your artworks on HEN contract, to benefit of the biggest audience by being visible everywhere, even if HEN is down.
You can only swap artwork YOU minted, it can't be used to make secondary market swaps