A user story is a small, self-contained unit of development work designed to accomplish a specific goal within a product. A user story is usually written from the user’s perspective and follows the format: “As [a user persona], I want [to perform this action] so that [I can accomplish this goal].”
In agile software development, a user story is a brief, plain-language explanation of a feature or functionality written from a user’s point of view. Many agile experts also describe a user story as the smallest unit of product development work that can lead to a complete element of user functionality.
User stories:
Most product teams use a similar user story template, typically just a sentence or two written according to the following formula:
As a [description of user], I want [functionality] so that [benefit].
In practice, user stories might look like these:
Like user stories, a use case describes how a user might interact with a product to solve a specific problem. But the two are not interchangeable; they are different tools used in product development.