Datadog offers App Analytics for PHP to help monitor performance, identify bottlenecks, and optimize user experience. The service provides distributed tracing, detailed performance metrics, and a Service Map to visualize application architecture and dependencies. It also includes auto-instrumented frameworks and libraries, open source tracing library, and support for various databases and operating systems. Datadog's APM features include Watchdog, traces, flame graphs, span summary, and correlating traces with logs. Additionally, App Analytics allows users to translate application insights into customer-level insights, creating flexible dashboards that combine app performance, infrastructure, and logs.