July 25, 2012

See also: Unduplicated Audience, Cume

CIMM DEFINITION: The amount of unduplicated homes or audience, expressed either as a percentage or in thousands who have viewed or tuned at least once during a time period or program or any piece of content.

2: Unique users that visited the site measured over the course of the reporting period, expressed as a percent of the universe for the demographic category. (Source: IAB)

3: The total number of unique users who will be served a given ad. Real time – events that happen live at a particular moment. When one chats in a chat room, or sends an instant message, one is interacting in real time. (Source: IAB)