What are user stories and how do you write them?

Question

Accepted Answer

**User story** — short, simple description of a feature from user perspective.

**Format:**
```
As a [type of user]
I want [goal/desire]
So that [benefit/value]
```

**Example:**
```
As a customer,
I want to save items to a wishlist
So that I can purchase them later
```

**INVEST criteria:**
- **I**ndependent — not dependent on other stories.
- **N**egotiable — details can be discussed.
- **V**aluable — delivers value to user.
- **E**stimable — team can estimate effort.
- **S**mall — can be done in one sprint.
- **T**estable — has clear acceptance criteria.

Business Analyst: What are user stories and how do you write them?