Open your project, then the Site audit tab.
- Choose how many pages to crawl. The list goes up to your plan's limit.
- Press Start audit. The cost in credits is shown next to the button.
- Keep the page open to watch the progress bar. The audit also continues in the background.
The crawler starts at your home page and the pages in your XML sitemap, follows internal links, and respects your robots.txt. When it finishes, the page reloads with your site health, the number of pages crawled, errors, warnings and notices, and the list of issues.
Only one audit per project runs at a time. Run a new one after you fix things to see the health score change.