Your sketches are just ideas. They are best guesses at what you should build. A prototype is your proof of concept. It’s the go-to tool for testing your idea and figuring out what does and doesn’t work.
What Is Prototyping?
A prototype is a working model of your proposed design—usually interactive mockups that simulate the experience of interacting with your content. Prototypes can be made in different levels of fidelity, ranging from the ultracrude (interactive sketches) to the highly polished (fully designed HTML prototypes). Unlike static mockups (like sketches or Photoshop comps), you can actually load your prototype in browsers and on smartphones, so you can share it with others to try out.
When you put a prototype in ...