5 recommended alerts to monitor your MongoDB deployment in Cloud Manager are Host Recovering, Repl Lag, Connections, Lock %, and Replica. These alerts help ensure the health and performance of your MongoDB instance by detecting potential issues such as a node entering recovering mode, replication lag, high connection counts, lock contention, and an oplog window that is too short. By setting up these alerts, you can proactively identify and address problems before they impact your application, ensuring a smooth and reliable database experience. Each alert has its own evaluation process to determine the severity of the issue, taking into account factors such as absolute limits, normal values, worrying thresholds, and critical levels. By following this process, you can customize alerts that are relevant to your specific environment and ensure optimal performance for your MongoDB deployment.