What is the primary function of Amazon Cognito?

The primary function of Amazon Cognito is to provide user authentication, authorization, and user management functions for web and mobile apps. This particularly includes the ability to issue OAuth 2.0 access tokens, allowing users to authenticate and authorize their access to applications and APIs securely.

Cognito facilitates the management of user identities, including sign-up and sign-in processes, multi-factor authentication, and the integration of third-party identity providers. By leveraging OAuth 2.0 protocols, it enables applications to delegate authorization allowing for secure access to protected resources without exposing user credentials. This makes it particularly useful for developers who want to implement secure user access in their applications without building authentication mechanisms from scratch.

The other options represent functions that are not the main purpose of Amazon Cognito. For example, while Cognito may indirectly affect data storage through user profiles and attributes, its primary role doesn't center around data storage or real-time data processing features typical of other AWS services. Static content distribution is also outside of Cognito's functionality, as that is more closely associated with services like Amazon S3 or Amazon CloudFront. Cognito's focus remains firmly on handling user identity management and access authorization.