> ## Documentation Index
> Fetch the complete documentation index at: https://docs.flagsync.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Measure feature impact in FlagSync with event-driven metrics.

## What Are Metrics?

Metrics show how feature rollouts affect users—like clicks, sign-ups, or purchases—by analyzing events and impressions.

<Tip>
  They’re essential for pinpointing optimal flag settings and driving data-backed experiments.
</Tip>

## Defining a Metric

Metrics start with [Events](/events/overview) you’ve tracked (e.g., `signup-cta-click`). Here’s what defines them:

<Info>
  Follow along in the Dashboard, click "+" next to **Metrics** or go to [Create a Metric](https://www.flagsync.com/dashboard/metrics/new/).
</Info>

### Measurement Type

Choose how to analyze data—each type powers experiments differently:

<CardGroup cols={2}>
  <Card title="Conversion Rate" icon="percent" href="/metrics/conversion-rate">
    Measures the percentage of users acting after seeing a flag (events ÷ impressions).
  </Card>

  <Card title="Numeric" icon="hashtag" href="/metrics-numeric/overview">
    Aggregates event values per user—e.g., counts, sums, or averages.
  </Card>
</CardGroup>

### Aggregation Method (Numeric Only)

For numeric metrics, pick how to process values:

* **Count**: Number of events per user (e.g., purchases).
* **Sum**: Total value per user (e.g., spend).
* **Average**: Average value per event (e.g., price).
* See [Numeric Metrics](/metrics-numeric/overview) for details.

### Metric Impact

Set the goal—does success mean more or less? This guides how results are interpreted in [Experiments](/experiments/overview):

<CardGroup cols={2}>
  <Card title="Increase" icon="chart-line-up">
    Higher values are better—e.g., more `signup-complete` events for registrations.
  </Card>

  <Card title="Decrease" icon="chart-line-down">
    Lower values are better—e.g., fewer `error-occurred` events for stability.
  </Card>
</CardGroup>

## Next Steps

* Explore types in [Conversion Rate](/metrics/conversion-rate) or [Numeric](/metrics-numeric/overview).
* Track events in [Quickstart: Send Events](/quickstarts/events).
* Define a metric in [Quickstart: Define Metrics](/quickstarts/metrics).
* Test with [Experiments](/experiments/overview).