First, navigate to the campaign where you'd like to connect Google Lighthouse, then click "Integrations" from the menu on the left side of the screen.

Next, either search "Google Lighthouse" in the upper right search box, or click the SEO category, then click Google Lighthouse.
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Then click Enable.

You should now see an "Integration Connected" confirmation. No login or signup is required.

When first activated, we'll automatically scan the campaign's URL. You can re-scan this URL page at any time via the "Perform Audit" button on the Google Lighthouse dashboard.