# Analytics

What was actually visible on your displays: every play measured on the display, judged by a rule, set against the planned time, closed for ad campaigns, and documented as a signed proof.

> **Type:** area
> **For:** Everyone who wants to know or prove what ran.
> **Where in the portal:** **Analytics** — the tabs **Overview**, **Displays**, **Content**, **Ad campaigns**, **Proofs**, **Devices**, and **Explore**

![The Analytics area in the Overview tab: at the top time zone, package, and period, below them the tab bar and availability against the planned time with the card Where the planned time went](/docs/analytics/bilder/04cca0e8-overview.png)

## Understand

Before you trust a number, you should know where it comes from and where the measurement ends.

| Page | When you need it |
|---|---|
| [What does analytics measure, and what does it not?](/docs/analytics/about-measurement) | Play, valid play, contact, and impact, the validity rule, measured, derived, and estimated, the planned time, and the limits of the measurement. |
| [Why is a gap not a zero?](/docs/analytics/about-gaps) | A planned hour without a report, open gaps with their deadline, late reports, closing and addendum. |
| [Read analytics: tabs, time ranges, and terms](/docs/analytics/read-analytics) | All seven tabs, the period, what each package commits to, and every term of the cards and the analysis. |

## Analyze

Five ways of looking at the same measurement: by display, by content, by ad campaign, as your own question, and by machine.

| Page | When you need it |
|---|---|
| [Check a display’s day](/docs/analytics/check-display-history) | Plan, panel, capture, what was shown, plays, and screenshots of one day on one axis, down to the single play. |
| [Analyze content: when, where, and on which days](/docs/analytics/analyze-content) | When a scene, a playlist, or a media item ran, on which displays, and on which days. |
| [Analyze ad campaigns](/docs/analytics/analyze-ad-campaigns) | Fulfillment, pacing, and forecast of an ad campaign, where and when it delivered, and what did not count. |
| [Run your own analysis](/docs/analytics/run-analysis) | Build a question as a sentence, read the result, save it as a view, share it, export it, and have it delivered regularly. |
| [Devices tab: machine metrics per device](/docs/analytics/device-metrics) | CPU load, memory, and free storage over time, system image and last report per device, in every package. |

## Prove

A proof is a document that a third party can verify without your involvement.

| Page | When you need it |
|---|---|
| [Proofs and links for advertisers](/docs/analytics/manage-proofs) | The directory of closings, addenda, and interim statements, their files, delivery by email, and time-limited links for advertisers. |
| [Check a proof](/docs/analytics/check-proof) | On the public verification page with number and check code or with the file, and by hand with the manifest and public key. |
| [When numbers are missing or wrong](/docs/analytics/troubleshooting) | Empty pages, ranges, open gaps, invalid plays, locked proofs: what is behind it and what helps. |