The best way to add a Google map to your website is to use Google Maps API. And Google recommends that you get an API key in order to use the maps.
You are not required to get an API key to use Google Maps API v3, but it's very useful as it lets you monitor your usage and pay for additional access. Google Maps API v3 has a quota of 1 request per second per user to a maximum of 25,000 requests per day. If your pages exceed those limits you will need to enable billing in order to get more.
How to get a Google Maps API Key
- Login to Google using your Google account.
- Go to the Developers Console
- Scroll through the list and find the Google Maps API v3, then click the “OFF” button to turn it on.
- Read and agree to the terms.
- Go to the APIs console and select “API Access” from the left-hand menu
- In the “Simple API Access” section, click on the “Create new Server key...” button.
- Enter in the IP address of your web server. This is the IP where your Maps requests will be coming from. If you don't know your IP address, you can look it up.
- Copy the text on the “API key:” line (not including that title). This is your API key for your maps.