a single visit by each computer that accesses any page
a visit to your site from an ip address
Unit of measurement used for web advertising; measures the number of unique people coming to a web site. Note: Every time a person leaves a site and comes back to the site, he is considered a unique visit.
One visit to a website by one visitor. The visitor may view any number of pages during a visit. If the visitor leaves and comes back later, this counts as a second unique visit. Exactly how much time needs to elapse between visits in order to count as a new visit depends on the way the analysing software is configured.
Represents a single, unique viewer who has visited a web site within a specified time period.
