Google Analytics is used to collect user data on georeferencer.com. This way you can see how many people are visiting your maps on OldMapsOnline or Georeferencer.
Please send us a tracking code for collecting the data. At first, create an analytics account at https://analytics.google.com/analytics/web/, set up the web analytics to your domain on georeferencer.com ([institution].georeferencer.com), and send us the tracking code which you will get in the following format:
OldMapsOnline also sends a lot of people to your own website showing the maps!