Each year we test over 20,000 ads globally, using our approach which is highly predictive of in-market performance. We take a shortlist of acclaimed ads, award-winning ads, and ad recommendations from all over the world, put them through our testing model, and then rank them from 1 to 5-Star according to their emotional power – their effectiveness. 2-Star is the norm but Nation’s Favourite Ad celebrates the cream of the crop – 4-Star and above.