Dynamic Sampling in Moesif, available to Enterprise plan customers, allows users to control which API calls are logged based on criteria like customer behavior or API paths, thus managing data volume and associated costs. It ensures accurate data representation through intelligent metric extrapolation, even with varying sample rates applied. Users can create sampling rules via Moesif's dashboard, setting sample rates for specific users, companies, or globally, with priority given to user-specific rules. While Dynamic Sampling aids in reducing excessive or unnecessary data, it should be avoided when precise tracking is needed, such as for monetized APIs or when using features like Metered Billing. The tool provides flexibility in managing API data while helping to maintain cost efficiency, although it's unnecessary if logged API calls are already within subscription limits.