- Upload multiple images
- Add hot spots to them (annotations/marks, what ever you wish to call them)
- Each hot spot gets set to link to a different image of the uploaded images
It's a way to demo a UI prototype/mockup.
So what happens is, once you are done, you'll share a link with someone.
And they would click through the images as they would normally do if those weren't static images but an actual UI.
Let me know if you need more elaboration.