Unique individual or browserBrowserA software program that can request, download, cache and display documents…//read more which has accessed a site or application and has been served unique content and/or ads such as e-mail, newsletters, interstitials or pop-under ads. Unique visitorsUnique VisitorsUnique individual or browser which has accessed a site or application and has…//read more can be identified by user registration, cookies, or third-party measurement like ComScore, Nielsen or Gemius. Reported unique visitors should filter out bots.