🚀 DevCycle is Now Part of Dynatrace! [Learn more](https://blog.devcycle.com/devcycle-is-now-part-of-dynatrace/) # What are Feature Flags? Development teams use feature flags to manage releases, measure user impact, and reduce deployment risk. ## Feature flags are a development strategy that helps teams… - Introduce updates in controlled phases - Seamlessly control application behavior - Personalize user interactions - Adapt content to regional regulations - Rapidly address bugs and performance glitches - Implement effective A/B testing - Rollback a problematic release ## A feature flag can be described as... A conditional statement that toggles specific functionality on or off based on a configuration. ## But what is "Feature Flagging"? Feature flagging is a software development technique that allows teams to modify system or application behavior without changing any source code. It supports teams looking to: #### Activate or deactivate specific application functionality #### Control the visibility of certain features #### Conditionally change feature behavior in real-time ## Feature flags make it easy to implement these development strategies [**Canary Releases & Dark Launches** Safely deploy a new feature to a small group of users for early feedback. LEARN MORE](https://blog.devcycle.com/canary-releases-explained/) [**Kill Switches** If a feature isn't working right, turn it off and fix it for your users. LEARN MORE](https://blog.devcycle.com/code-kill-switches-explained/) [**Product Experimentation** Run experiments and A/B tests to determine the impact of your changes. LEARN MORE](/content/blog/announcing-ab-testing-experimentation-platform-for-feature-flags/index.html) [**Progressive Delivery** Employ safety measures and control mechanisms that reduce the risks associated with deploying new code to prod. LEARN MORE](https://blog.devcycle.com/progressive-delivery-explained/) [**Infrastructure Migration** Safely move from on-prem to a cloud provider using feature flags to avoid downtime. LEARN MORE](https://blog.devcycle.com/infrastructure-migrations-explained/) ## What is Feature Management? Feature management refers to a modern toolset for managing feature flags at scale that provides a framework for feature flag-driven development practices. It includes features that help you streamline flag implementation across teams, platforms, and applications. ## Types of Feature Flags Feature flag categories were initially coined by Pete Hodgson in [this iconic blog post.](https://martinfowler.com/articles/feature-toggles.html) #### Releases Release feature flags are used to separate a feature from deployment and allow for a true continuous delivery cycle. #### Experiments Experiment feature flags can be used to run A/B and multivariate experiments to monitor the impacts of different code paths or provide different variations of a single feature. #### Permissions Permission feature flags are used to manage different product features that are gated based on user properties. #### Ops Ops feature flags are intended to live in your code long-term, allowing you to disable or degrade features that are having a negative impact on performance and stability. ## 10 Real-Life Use Cases for Feature Flags 01 **Publishers use DevCycle** to add Google SSO to their authentication system 02 **Sports fan Apps use DevCycle** to push real-time updates to their users 03 **Marketing firms use DevCycle** to experiment with new features across multiple domains 04 **SaaS companies use DevCycle** to customize their new user experience based on their interests 05 **Mobile app companies use DevCycle** to experiment with different landing pages 06 **Marketplaces use DevCycle** to show real-time recommendations to their power users 07 **Banks use DevCycle** to launch new browser extensions 08 **Fintech companies use DevCycle** to show their users different features based on their plan 09 **Devtool companies use DevCycle** to migrate from one database to another without downtime 10 **eCommerce companies use DevCycle** to rapidly launch new products to targeted user groups 11 **DevCycle (👋) uses DevCycle** to keep this list fresh and relevant without deploying new code! ## What is OpenFeature and how does it work with feature flags? OpenFeature is an **open specification** that provides a **vendor-agnostic, community-driven API** for feature flagging that works with your favorite feature flag management tool. - Developed by industry experts - Avoid vendor lock-in at the code level - Ultimate flexibility with standardized SDKs DevCycle SDKs are built from the ground up to support the OpenFeature standard, making it a great choice for future proofing your product. ## Feature Flag FAQs Everything you need to know about feature flags, their benefits, risks, and best practices. - What is a feature flag?+ - Why do teams use feature flags?+ - What are the main types of feature flags?+ - How do feature flags work in practice?+ - What are best practices for managing feature flags?+ - How do feature flags support experimentation?+ - How do feature flags differ from configuration flags?+ - How do I implement feature flags in my application?+ - What is the OpenFeature standard?+ - How do feature flags help with continuous delivery?+ - How should I test code that uses feature flags?+ - What is progressive delivery and how do feature flags enable it?+