MongoDB Atlas provides a managed database service that allows users to seamlessly deploy and expand their data layer, reducing operational overhead and distractions from strategic initiatives. By using MongoDB Atlas, developers can import their existing MongoDB data into the cloud-based service, eliminating the need for manual database administration and management. With MongoDB Atlas, users can take advantage of features such as secure in-the-cloud security, automatic alerting and IOPS management, and simplified long-term management, making it an attractive option for companies looking to migrate their databases to a managed service. The process of importing data into MongoDB Atlas involves converting the existing database to a replica set, configuring firewall rules, setting up database users, and performing a cutover to the new cluster. By using MongoDB Atlas, developers can gain access to a fully-managed database service that provides the benefits of scalability, security, and reliability without the need for manual management.