Web application monitoring is essential for ensuring smooth operations, especially for critical backend services, and utilizing tools like Logz.io can significantly aid in this process. The text provides a comprehensive guide on setting up a monitoring system for a web application using an Nginx server. It outlines the installation and configuration of various components, including Nginx, Filebeat, Prometheus, and the Nginx Prometheus Exporter, to collect and visualize metrics. The guide emphasizes the use of Logz.io’s Prometheus-as-a-Service for storing and visualizing metrics, alongside Kibana for log visualization. By configuring these tools, users can create dashboards, track performance, and gain insights into web application usage, all while leveraging Logz.io's AI-powered observability features to enhance monitoring capabilities.