---
title: "Event Information"
description: "Learn about the information we attach onto events."
url: https://docs.sentry.io/platforms/react-native/usage/event-information/
---

# Event Information | Sentry for React Native

The Sentry React Native SDK will automatically add information onto your event to make it easier to debug and understand your app.

## [Event Origin and Environment Tags](https://docs.sentry.io/platforms/react-native/usage/event-information.md#event-origin-and-environment-tags)

The event origin tag tells you which layer of your app the event originated from.

The possible values for `event.origin` are:

* `javascript`
* `android`
* `ios`

The event environment tag tells you which environment the event originated from.

The possible values for `event.environment` are:

* `javascript`
* `java`
* `native`

For example, if a native crash happens when your app is running on iOS, the event could be tagged with `event.origin: ios` and `event.environment: native`.