Store Locator Plus for WordPress requires the user of the plug-in to obtain their own Google Map API key as described in our Getting Started Guide.
Google has revamped its Google Maps API developer platform. With the changes to the way Google is handling the API keys, this may be a good time to rethink the overall management of your location services. The MySLP SaaS platform takes care of all that for you. You only need to embed the JavaScript code that MySLP provides when you sign up.