A lot of things stories can do. Make sure they do.
“Within the everyday chaos of an average design project, part of what makes stories so valuable is their nimbleness and flexibility. They can easily be ordered, re-ordered, and grouped in any number of ways depending on your current need, such as by category, priority, complexity, sprint, or whatever, and you can do this in a highly ad-hoc manner. Team members can use the same card for everything from affinity diagrams to product road maps to scrum boards and on and on. But this level of flexibility also has drawbacks.”
(Anders Ramsey a.k.a. @andersramsay)