Google Map API Key for Geocoding

I'm in need of a Google Map API Key for an address autocomplete feature on a website. The key should enable geocoding addresses and provide an address autocomplete feature.

Please note, the main functionalities we need are:
- Geocoding addresses
- Address autocomplete

Please note, the API will be used to geocode both residential and business addresses. Your task will be to ensure that the API is successfully integrated into the website form for address autocomplete.