---
title: "Explore your cardinality | Grafana Labs"
description: "Hands-on practice reading the Cardinality tab in the Cost Management and Billing app"
---

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

## Interactive guide: Explore your cardinality

The **Cardinality** tab in the Cost Management and Billing app shows up to 30 days of historical cardinality for your stack, highlights metrics that are new or unused, and links to remediation actions.

Access to the Cardinality tab requires the `grafana-cmab-app.cardinality:read` permission. Refer to [Manage access to the Cost Management and Billing app](/docs/grafana-cloud/cost-management-and-billing/set-up/cost-management-billing-rbac/). If your stack is new or isn’t receiving metrics yet, the tables will be empty or sparse.

#### Explore your cardinality

Complete this interactive guide directly in your Grafana Cloud stack with an interactive learning experience.

[Open in Grafana Cloud]()

## Three questions to ask

Now that you’ve used the Cardinality tab to identify which metrics and labels are contributing to your active series count, ask three questions:

- **Which metrics produce the most series?** They’re your biggest cost levers.
- **Which labels have the most unique values?** They’re the multiplication factors to challenge.
- **Is anything both high-cardinality and unused?** That’s cost with no value, and the easiest win.