Getting Google Maps API Key

This plugin relies on the Google Maps API to work. Copy your API Key from the Google Cloud Console into the plugin’s settings(WooCommerce->Shipping->Location Picker At Checkout) and then save your changes to see the map on the checkout page.

See this doc for retrieving your API key: https://lpacwp.com/docs/getting-started/google-cloud-console/getting-your-google-maps-api-key/