So what is this one-page write-up? It is a simple document that explains how it feels to use the site. In almost all the projects I have worked with, when someone new joins the team, they will be quickly discouraged if asked to go through every bit of paperwork. But they will be thrilled if they find a single-page document that quickly tells them what the site is meant to be.
You can call this document whatever you like—concept document, market requirements document, customer experience documentation, or even an Epic Fragile StoryLog™ (patent pending). It really doesn't matter.
The document should focus on the user experience rather than technical or implementation details. Make it short and interesting to read. In fact, Joel Spolsky's rule number one on documenting requirements is funny.
If possible, write about a typical user (persona...
