---
title: Real User Monitoring (RUM)
description: Real User Monitoring captures user interaction with clients such as web browsers. The JavaScript Agent is Elastic’s RUM Agent. Unlike Elastic APM backend...
url: https://www.elastic.co/elastic/docs-builder/docs/3016/solutions/observability/apm/apm-agents/real-user-monitoring-rum
products:
  - APM
  - Elastic Observability
applies_to:
  - Elastic Cloud Serverless: Unavailable
  - Elastic Stack: Generally available
---

# Real User Monitoring (RUM)
Real User Monitoring captures user interaction with clients such as web browsers. The [JavaScript Agent](https://docs-v3-preview.elastic.dev/elastic/docs-builder/docs/3016/reference/apm/agents/rum-js) is Elastic’s RUM Agent.
Unlike Elastic APM backend agents which monitor requests and responses, the RUM JavaScript agent monitors the real user experience and interaction within your client-side application. The RUM JavaScript agent is also framework-agnostic, which means it can be used with any front-end JavaScript application.
You will be able to measure metrics such as "Time to First Byte", `domInteractive`, and `domComplete` which helps you discover performance issues within your client-side application as well as issues that relate to the latency of your server-side application.