Chapter 5. Conclusion

Agility is a driving force in modern product development. Businesses that develop better products faster are able to out-innovate their competition. The software industry has developed many techniques to serve this need for agility: from trunk-based development to Continuous Delivery to microservices.

In this book, we covered a simple, yet powerful primitive that is central to many of these techniques—the feature flag. Its power lies in breaking down a product into a set of features that can be dynamically targeted to customers without redeploying code. It takes companies on the journey from Continuous Integration to Continuous Delivery, and finally, to Continuous Experimentation.

The ultimate benefit for companies adopting feature flags is not only an increase in speed and quality, but also a significant reduction in risk to their product development practices, which leads to superior customer experiences.