---
title: Signals
description: Learn about the categories of telemetry supported by OpenTelemetry
aliases:
  - /docs/concepts/data-sources
  - /docs/concepts/otel-concepts
weight: 11
---

In OpenTelemetry, a **[signal][]** refers to a category of telemetry. A brief
introduction to the currently supported signals is provided in this section.

[signal]: /docs/reference/specification/glossary/#signals
