Television advertising / Music in advertising
The television commercial is generally considered[by whom?] the most effective mass-market advertising format, as is reflected by the high prices television networks charge for commercial airtime during popular events. The annual Super Bowl football game in the United States is known as the most prominent advertising event on television.[citation needed] The average cost of a single thirty-second television spot during this game reached US$3.5 million in 2012.[citation needed] Virtual advertisements may be inserted into regular programming through computer graphics. It is typically inserted into otherwise blank backdrops[36] or used to replace local billboards that are not relevant to the remote broadcast audience.[37] More controversially, virtual billboards may be inserted into the background[38] where none exist in real-life. This technique is especially used in televised sporting events.[39][40] Virtual product placement is also possible.