Application Insights Telemetry Sources

Application Insights gathers two main types of data: telemetry from your server-side code and telemetry from client-side web pages. On the server, it captures HTTP requests that come into your application, information about external services your code calls (like databases or storage), error logs called exceptions, and performance measurements like CPU and memory usage. It also allows developers to create custom events and metrics that track business-specific information, plus detailed trace logs that record what the code is doing step by step.