title: Google maps API v3 - How are client loads detected?
body: <p>I have a small and low key website what features Google Maps using the v3 Javascript API. </p>
  
  <p>Not that I am expecting to get over 25,000 loads per day, but how does Google detect people loading the map on my site? My site uses the the following code <code>http://maps.google.com/maps/api/js?sensor=false</code> without any API key, and as it is rendered in the clients browser, how does Google relate it to my site?</p>
  
  <p>Is the loads worked out through the http headers/referrers or are the loads based on how many times each client/IP loads the map?  </p>
  
  <p>In essence, the code for the map is rendered on my clients/users browsers and thus how do Google know how many people are using the map on my site?</p>
  
  <p>Finally; although I have Google web master tools; is it worth creating &amp; using a API key, or will it just make it possible for Google to track how many people are using the map on my site and thus apply the limit of 25,000?</p>