To access the contact page settings, you need to navigate to a page in your store that is using the contact page template while you are customizing the theme settings. If you are having trouble finding these settings, follow these instructions:
Ensure you have a contact page set up. See the first section of this article if you need help.
From your Shopify admin, to the Online Store > Themes page and use the Customize theme button to start customizing your theme.
In the preview of your store on the right side of the page, navigate to your contact page.
Open the Contact page settings.
Enable embedded map
Select this checkbox to enable the map area of the contact page.
Enter the street address of your store, including the city and state or province.
For example, enter 1234 Example St, Manhattan, NY.
Google Maps API Key
Enter your Google Maps API key.