Amazon Cognito is a developer-centric service that enables secure customer identity and access management for web and mobile applications. It offers flexible signup and sign-in features, including social and enterprise identity provider integration, and a customizable hosted UI. Cognito scales to millions of users with a fully managed, high-performance identity store. The service provides robust APIs for building customized authentication experiences and is certified for numerous compliance programs. Cognito integrates seamlessly with other AWS services and third-party tools, allowing developers to create personalized, secure user experiences while reducing friction through features like adaptive authentication and intelligent bot detection.