If you want to do DevOps, you must constantly deliver value to your customers and gather evidence of the success in production. This means constant, zero downtime deployments and testing new features with smaller sets of customers (A/B testing, canary releasing). The talk gives an overview over Feature Flags and how you can use them to optimize your value delivery with experiments. It gives practical tips how to implement Feature Flags without generating technical debt and covers the topics Canary Releases and A/B Testing. In a practical demo the talk will show how to use Visual Studio Team Services and Launch Darkly to create a Feature Flag based solution to conduct experiments.