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Resolution – The quality of an image or video file often determined by the number of pixels displayed on the screen and usually annoted as a pixel width and height dimension. However, resolution can be measured in a number of ways and takes into account pixel aspect ratio, pixel density, and other factors that determine the viewing quality of the file.

Retraction – An event programmed into an expandable ad the causes the ad to be reduced to its original dimensions (i.e. the expanded portion of the ad retracts).

Rising Stars Display Ad Units – IAB invited companies and individuals to submit ad templates designed to drive brand equity. Six templates were chosen to be validated by the market. Rising Star Display Ad Units are designed to be the only ad on a page. Their file load limits are larger than for other ads, so not only would a Rising Star Ad Unit overshadow any other ads on the page but they would also compromise the performance of the page should other rich media ads be allowed to load simultaneously.

Rollover – The willful pause of the user’s cursor on the target portion of the creative (the “hot spot”), such pause lasting at least one second in duration, before an action may be initiated by the ad (i.e. trigger an expand event, etc.). This one-second pause/delay requirement prevents unwanted, user-initiated actions and false reporting of user engagement. Rollover may NOT initiate audio.