The author of this article guides through the process of migrating a MongoDB deployment from Cloud Manager to MongoDB Atlas, a database as a service. The author uses a node-todo app as an example and walks the reader through each step of the migration process, including setting up network connectivity, modifying default settings, and configuring user accounts for access control. The article highlights the benefits of using MongoDB Atlas, such as automated deployments, elastic scalability, and security patches, and provides instructions on how to migrate data from Cloud Manager to Atlas using the live migration service. The reader is left with a fully managed database service that can be easily managed and maintained.