At what time during the day did the traffic on your website produce the response that you were looking for?

The Time Span Filter enables you to evaluate when visits occurred, returning data for specific time periods over the course of a 24-hour period. 

A Filter could be set up to display the number of user sessions which occurred between 8:30 a.m. and 10:15 a.m. as compared to between 10:30 p.m. and 2:30 a.m. 

Used in conjunction with the other SiteAnalyze Filters, the Time Span Filter refines the display of other filtered data to the times in which you are interested.