> ### This feature is in beta
>
> To use this feature, pass in a header including the `LD-API-Version` key with value set to `beta`. Use this header with each call. To learn more, read [Beta resources](https://launchdarkly.com/docs/api#beta-resources).
>
> Resources that are in beta are still undergoing testing and development. They may change without notice, including becoming backwards incompatible.

Metrics measure audience behaviors affected by the flags in your experiments. Metric groups are reusable, ordered lists of metrics you can use to standardize metrics across multiple experiments. To learn more, read [Metrics](https://launchdarkly.com/docs/home/observability/metrics) and [Metric groups](https://launchdarkly.com/docs/home/observability/metric-groups).

Using the metrics API, you can create, delete, and manage metrics and metric groups.