The Address validator plugin enables the validation of addresses entered by the user. It uses some third party services or APIs for that purpose. The initial implementation uses Google Geocoding API, but it can be extended to use different APIs. The Address validation is optional, this means users can choose not use it and they can store invalid addresses.
Additionally, if the API returns data about latitude and longitude for a valid address, those values will be stored in the system as custom fields attached to the address.