MongoDB Atlas is an ideal choice for Apostrophe as it provides flexible schemas, rich queries, and idiomatic Node.js driver, along with simple high availability and scaling. MongoDB Atlas offers pay-as-you-go model, security features, built-in replication, backups, fine-grained monitoring, automated patching, and one-click upgrades. It simplifies the development and operations work for users, allowing them to focus on what makes their application unique rather than commodity plumbing. To use MongoDB Atlas with Apostrophe, users need to launch a MongoDB cluster, create an Apostrophe user, add IP address of application server to security tab, install Node.js and ImageMagick, clone the Apostrophe Sandbox project, configure data/local.js file, open port 3000 in firewall, and test the application. The use of MongoDB Atlas with Apostrophe provides a secure, scalable, and reliable database solution for content-driven web sites.