Statsig employs "Feature Gates" as a mechanism to control the release and testing of new software features by acting as gatekeepers that determine user eligibility based on predefined rules and conditions. These gates allow developers to manage feature rollouts by specifying conditions, such as user email domains, and percentages of users who can access features, facilitating gradual releases and A/B testing. The process involves creating rules with conditions, which are evaluated to decide if a user should have access to a feature. This approach helps decouple development cycles from release cycles, enabling teams to validate features and measure impacts before broader deployment. Statsig offers tools to enhance development workflows and experimentation, encouraging developers to explore these capabilities through their free services and demo accounts.