The OpenTelemetry project offers three primary data sources: traces, metrics, and logs. Traces capture details of individual requests, providing detailed information about each request's latency and performance. The Trace API allows developers to create spans that can be associated with a globally unique identifier, enabling the propagation of trace context across service boundaries. The Metric API enables the collection of aggregated measurements, such as CPU utilization and request duration, while the Log API provides a structured text record in a time-stamped format for filtering by strategic attributes. These data sources are used to monitor and analyze application performance, providing valuable insights into system behavior and enabling data-driven decision-making.