---
title: "Frontend observability overview | Grafana Labs"
description: "Real user monitoring and Core Web Vitals tracking"
---

> For a curated documentation index, see [llms.txt](/llms.txt). For the complete documentation index, see [llms-full.txt](/llms-full.txt).

## What you get

| Capability                 | Description                                                                            |
|----------------------------|----------------------------------------------------------------------------------------|
| **Core Web Vitals**        | Largest Contentful Paint (LCP), First Input Delay (FID), Cumulative Layout Shift (CLS) |
| **Page load performance**  | Navigation timing, resource loading                                                    |
| **JavaScript errors**      | Capture and trace frontend exceptions                                                  |
| **Performance alerts**     | Alert when Core Web Vitals degrade                                                     |
| **User sessions**          | Track user journeys and interactions                                                   |
| **Trace context**          | Connect frontend actions to backend traces                                             |
| **Geographic performance** | See performance by region                                                              |

## Questions answered

| With Frontend Observability, you can answer…                  |
|---------------------------------------------------------------|
| Why are users in Europe experiencing slower load times?       |
| What JavaScript errors are affecting my checkout page?        |
| Which pages have the worst Core Web Vitals scores?            |
| What did the user do before this error occurred?              |
| How does my real user performance compare to synthetic tests? |

## Problems solved

| Problem                                    | Solution                                  |
|--------------------------------------------|-------------------------------------------|
| Users report “slow” but backend looks fine | See actual browser performance.           |
| JavaScript errors go unnoticed             | Automatic error capture with context      |
| Can’t connect frontend to backend issues   | Trace propagation links the full journey. |
| No visibility into real user experience    | RUM metrics from actual users             |

## The full picture

[Frontend to backend trace flow showing browser interaction through to database](grafana-cloud-frontend-backend-trace-1.svg "Frontend to backend trace flow showing browser interaction through to database")