What does the above case study say about celebrity endorsement in advertising?

The Super Bowl has always been an advertising phenomenon. In 2014, advertisers shelled out a record $4 million for a 30-second commercial during the contest. Afterwards, the media world held its breath to see how the commercials went over with TV audiences. The 2014 NFL season finale ended up being the biggest to date. An average 112.2 million viewers tuned in to see the Seattle Seahawks destroy the Denver Broncos, making it the most watched Super Bowl and the most watched television programme in US history.