Sign in to the Google Cloud Console (<code>https://console.cloud.google.com/</code>), create a project, enable <strong>Maps JavaScript API</strong> (and optionally <strong>Geocoding API</strong>), then <strong>Credentials → Create credentials → API key</strong>. Restrict the key to your site by HTTP referrer. Paste it into <strong>Settings → Slick Google Map → Google Maps API key</strong>. The Maps Platform gives you a ~\$200/month free credit, which is roughly 28,000 dynamic map loads — enough for most personal sites at no cost.