Here is a 1-paragraph summary of the text: MongoDB provides various free and paid monitoring solutions for its users, including local MongoDB installations and MongoDB Atlas clusters. The free solution includes built-in monitoring on locally installed MongoDB servers, which can be enabled with a single command, and also comes with monitoring on MongoDB Atlas clusters in the M0 tier. As users scale up their Atlas clusters, more data is automatically gathered and made available for visualization. In addition to these free solutions, MongoDB offers paid premium monitoring tools that provide real-time browsing of cluster metrics, including CPU and disk utilization, query execution times, and number of operations being run. The choice of which solution to use depends on the user's needs and preferences, with recommendations to choose the one that provides the most information with minimal configuration.