Every server records every action into a log. Depending upon traffic, these logs may be maintained on a daily, weekly or monthly basis. We recommend a monthly analysis of the logs to get a perspective on activity. I use Analog, which is free. Next month when we discuss these programs I will show some screen shots from WebTrends live and a report from Analog.
Definitions are critical to understanding websites.
I want to note the distinction between referrer URL and referrer Domain. There is a significant difference between these referrer URL and referrer domain. I was caught by surprise by the number of visitors referred by Google. Each referral had a different key word or URL and I never added them together to understand just how important google was to our visitor traffic. Using the referer domain measurement, you will spot these trends.