Product
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.
Learn this term every day on iPhone.
One hand-written term. A real workplace example. Thirty seconds before your day gets loud.
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.
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.