LaunchDarkly has introduced Prerequisites (beta) to allow customers to control feature dependencies by evaluating Flag B only if Flag A is "on" for a particular user. This functionality enables smarter, conditional feature releases and can be managed in the feature flag's Targeting tab. Prerequisites are useful for mutually exclusive experiments, allowing users to compartmentalize experimentation without hardcoding logic into their codebase. The use of prerequisites also decouples experiments from the codebase, making it easier to modify and test features.