One of the best ads I've ever seen came out when I was 13 years old and I can still remember all the words to the song today. The Thinkbox campaign 'Harvey & Rabbit' was created by Red Brick Road and illustrates its point perfectly; a TV ad should speak for itself. The ad gives very few details about what the brand can offer the consumer but there doesn't really need to be any. The best ads I've seen are engaging enough to draw your attention quickly but won't prattle on about how they can offer you a 0% APR variable. This ad sticks in your mind and gives you just enough information that you can go and research it as soon as you've seen it. Clever not cluttered. Job done.