PencilBlue is a Node.js based open source blogging and Content Management System targeted at enterprise grade websites, which can leverage MongoDB Atlas for its flexible schemas, rich queries, idiomatic Node.js driver, high availability, scaling, security features, replication, backups, monitoring, automated patching, and billing options. To use PencilBlue with MongoDB Atlas, a user needs to launch their MongoDB cluster using MongoDB Atlas, create a user with read and write privileges for the database used in the project, add their IP address to the MongoDB Atlas security tab, download and install Node.js, add the bin sub-folder to .bash_profile, install the PencilBlue command line interface (CLI), configure PencilBlue to use MongoDB Atlas, and start the PencilBlue process. Once configured, the user can create a new page in PencilBlue, connect to MongoDB Compass to explore the schema and data, and follow best practices for deploying and managing their application with MongoDB Atlas.