DevOps & CloudIntermediate
Feature Flag
PronunciationFEE-cher FLAG
Definition
A switch in the code that turns a feature on or off without a new deployment, often for a small group of users first.
Where you hear it
Gradual releases and A/B testing.
Examples
The new checkout is behind a feature flag for 10% of users.
If something breaks, just switch the flag off.
Common mistake
Never removing old flags. They pile up and make the code confusing.