Address Autocomplete allows customers to quickly fill in their address using Google Maps JavaScript API to intelligently find their address.
If you have a Plus (Legacy), Pro, or Agency (150 Sites) license, you can enable Address Autocomplete in WP Admin > CheckoutWC > Checkout.
Configuring Google API Keys can be a bit tedious, to help guide you in the process we have created a separate doc: How To Get and Configure Your Google API Key
Check the box for “Enable address autocomplete” and then fill in your Google Maps JavaScript API Key:
Then click Save Changes.