Several user reports are available that allow you to determine overall site activity, sorted by various criteria.
The traffic reports list:

This report shows the top viewed categories of the shop for the selected period.
This report shows the top referring sites to the shop and the corresponding views for the selected period.
This report shows the unique visitors of the shop for the selected period, sorted by last access date. It includes hostname, ip-address, country, first access date and last access date.