---
title: "Concepts"
description: "Learn about important concepts that are essential to using Sentry."
url: https://docs.sentry.io/concepts/key-terms/
---

# Concepts

* #### [Key Terms & Features](https://docs.sentry.io/concepts/key-terms/key-terms.md)

  A few key terms and features to help you get a better understanding of Sentry.

* #### [Data Source Name (DSN)](https://docs.sentry.io/concepts/key-terms/dsn-explainer.md)

  A Data Source Name (DSN) tells Sentry where to send events so they’re associated with the correct project. Learn more about DSN structure and use here.

* #### [Sample Rates](https://docs.sentry.io/concepts/key-terms/sample-rates.md)

  Learn how to manage the amount of data you send and are billed for in Sentry by adjusting the sample rates of various Sentry products including Traces and Session Replays.

* #### [Creating and Filtering Environments](https://docs.sentry.io/concepts/key-terms/environments.md)

  Learn how environments can help you filter issues, releases, and user feedback in Sentry.

* #### [Event Data](https://docs.sentry.io/concepts/key-terms/enrich-data.md)

  Learn about event data and how to configure Sentry workflows and tools to fine-tune the data sent to Sentry.

* #### [Tracing](https://docs.sentry.io/concepts/key-terms/tracing.md)

  Learn more about the tracing features Sentry offers to help you track your software performance across multiple systems.

* #### [Extrapolation](https://docs.sentry.io/concepts/key-terms/extrapolation.md)

  Learn how extrapolation provides accurate metrics from sampled data so you can trust your dashboards and alerts even when you're not capturing every event.

## Pages in this section

- [Key Terms & Features](https://docs.sentry.io/concepts/key-terms/key-terms.md)
- [Data Source Name (DSN)](https://docs.sentry.io/concepts/key-terms/dsn-explainer.md)
- [Sample Rates](https://docs.sentry.io/concepts/key-terms/sample-rates.md)
- [Creating and Filtering Environments](https://docs.sentry.io/concepts/key-terms/environments.md)
- [Event Data](https://docs.sentry.io/concepts/key-terms/enrich-data.md)
- [Tracing](https://docs.sentry.io/concepts/key-terms/tracing.md)
- [Extrapolation](https://docs.sentry.io/concepts/key-terms/extrapolation.md)