What role is responsible for educating users about the functionality of services?

The role that is most directly responsible for educating users about the functionality of services is Trainers. Trainers are specifically tasked with delivering educational content, demonstrations, and workshops that help users understand how to effectively utilize the services provided. This role focuses on developing the user's knowledge and skills, ensuring they can navigate through the service offerings proficiently.

While other roles like Account Managers, Product Management, and Customer Support may engage in some educational initiatives or provide guidance, their primary functions differ. Account Managers tend to focus more on maintaining customer relationships and addressing any strategic needs of the client. Product Management oversees the development and roadmap of services but is less involved in user education on a direct basis. Customer Support primarily addresses issues or queries that arise after users have begun using the service, rather than proactively educating them on functionalities. Therefore, it's the Trainers who are principally charged with the mission of educating users, making them the correct answer in this context.