# Performance AnalyticsPerformance Analytics audits the most recently published version of a WebPros Nova project and reports four scores (0–100): Performance, Accessibility, Best Practices, and SEO. Performance lab data includes LCP, CLS, FCP, TBT, and Speed Index for both desktop and mobile. Each score category lists specific issues; click Try to fix to have Nova auto-generate a remediation prompt. Requires a published website; unpublished changes are not evaluated.

Performance Analytics shows audit results for the last published version of your project. Nova collects performance scores and related metrics for both desktop and mobile views.

Use your performance reports to review:

- How your published website performs on desktop and mobile.
- Audit scores for performance, accessibility, best practices, and SEO.
- Technical issues that may slow down your website or reduce its overall quality.

To view your Performance Analytics, open your project in Nova and click the _Dashboard_ icon (![dashboard icon](/images/icons/dashboard-icon.svg)). Then, click _Performance_ (![performance icon](/images/icons/performance-icon.svg)) from the dashboard menu.

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You must publish your website to run performance audits. If you have not published your website yet, see [Website Publishing](/en/features/publish/website-publishing/) first.

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## Run an audit

Click _Run Audit_ to generate your first report. If your project already has a report, click _Update Audit_.

The audit tests your published website by simulating a mobile device and a desktop browser. Use the device selector to switch between results for _Mobile_ and _Desktop_ experiences. The _Last analyzed_ timestamp shows when Nova generated the current report.

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The audit only evaluates the currently published version of your website. Nova will ignore unpublished changes in the editor. Publish your changes before updating an audit.

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## Understand your scores

A complete audit shows four scores ranging from 0 to 100, where higher is better:

| Score | What it measures |
| --- | --- |
| _Performance_ | How fast your website loads and becomes usable. |
| _Accessibility_ | How easily people using assistive features navigate your website. |
| _Best Practices_ | How well your website follows modern web development standards. |
| _SEO_ | How effectively search engines can find your website. |

As a general guide, a score of 90 or above is good, 89 to 50 needs improvement, and below 50 is poor.

Select a score to [review issues by category](#review-issues-by-category).

## Lab Data

The _Lab Data_ section shows performance results that Nova simulates in a controlled environment. These measurements update every time you run an audit.

| Metric | What it measures |
| --- | --- |
| _LCP_ (Largest Contentful Paint) | How long it takes for the largest visible element to appear. |
| _CLS_ (Cumulative Layout Shift) | How much visible content unexpectedly moves while loading. |
| _FCP_ (First Contentful Paint) | How long it takes for the first text or image to appear. |
| _TBT_ (Total Blocking Time) | How long background processes block the page before it can respond smoothly. |
| _Speed Index_ | How quickly visible content appears across the page. |

## Review issues by category

This list shows relevant issues for the score category you select. Use it to review specific problems and identify which items may have the biggest impact on your website.

Click the _Try to fix_ (![wrench icon](/images/icons/wrench-icon.svg)) button next to an issue to address it. Nova will generate a prompt and attempt to fix the issue automatically.

| Category | What it shows | Examples |
| --- | --- | --- |
| _Performance Issues_ | Identifies opportunities and diagnostics that can improve page load performance. | <ul><li>Inefficient cache lifetimes</li><li>Document request latency</li><li>Forced reflows</li></ul> |
| _Accessibility Issues_ | Provides checks that help make your website usable for all users, including those with disabilities. | <ul><li>Insufficient color contrast</li><li>Missing lang attributes</li><li>Missing image alt attributes</li><li>Missing main landmarks</li></ul> |
| _Best Practices Issues_ | Evaluates web development best practices, including security and modern API usage. | <ul><li>Browser errors logging to the console</li><li>Using deprecated APIs</li><li>Serving images with incorrect aspect ratios</li></ul> |
| _SEO Issues_ | Provides checks that help search engines understand and rank your content. | <ul><li>Pages blocking indexing</li><li>Missing meta descriptions</li><li>Unsuccessful HTTP status codes</li><li>Missing title tags</li></ul> |

## Improve your scores

To improve your website's performance over time:

1. Run or update an audit.
2. Review the lowest score or the most important issues in the selected category.
3. Click _Try to fix_ or make changes manually.
4. [Publish](/en/features/publish/website-publishing/) your updates.
5. Return to the _Performance_ tab and update the audit.

Repeat this process until your published website reaches the results you want.