While not a new concept — the oldest blog post I can find about successfully using feature flags is from Flickr and now more than a decade old — commercial feature management and experimentation products are relatively new when compared to other DevOps technologies such as continuous integration (CI) and continuous delivery (CD), having only come onto the market in the past half-decade or so. Feature flags work by encapsulating code within an if statement and then having a process, such as reading a value from a configuration file, to determine whether the conditional value is true or false.

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