Counters (Rich Media metric)
This custom metric counts the number of times that a user interacts with any part of a Rich Media ad in a specified way (mouse-overs, mouse-outs, click-ins, data loading, keyboard entries, etc.). Anything that can be captured by the creative code can be recorded with a counter.
By default, only one counter event is counted per impression (except for exit links, which are counted every time). However, the designer can override this default to allow multiple events to be counted within a single impression.