# What is Feature Flag?

A switch that turns a feature on or off without deploying new code. It lets you release to a small group first or roll back instantly if something breaks.

## In real work

Wrap the new checkout flow in a feature flag. Start with 5% of users. Roll it back immediately if error rate spikes.

## Related terms

- [User Story](https://prompthausapp.com/learn/user-story.md)
- [Acceptance Criteria](https://prompthausapp.com/learn/acceptance-criteria.md)
- [MVP](https://prompthausapp.com/learn/mvp.md)
- [Jobs To Be Done](https://prompthausapp.com/learn/jobs-to-be-done.md)
- [Product-Market Fit](https://prompthausapp.com/learn/product-market-fit.md)

## How is this different from Googling it?

Google gives a definition. Prompthaus pairs each term with how it shows up in standups, PRs, prompts, and design reviews—then quizzes you until the word sticks. One term a day on iPhone.

- Category: Product
- HTML: https://prompthausapp.com/learn/feature-flag
- App Store: https://apps.apple.com/us/app/prompthaus-ai-vocabulary/id6776314407