The Google Maps Settings section in the Event theme Customizer contains 2 options. Navigate to Appearance → Customize → Theme Options → Google Maps Settings to access these settings.

Options

• Browser API Key (Text) — Google Maps JavaScript API key for displaying maps on the front end.
• Server API Key (Text) — Google Maps server-side API key for geocoding requests.

After making changes, click Publish at the top of the Customizer to save your settings.