Best and worst advertising you've seen

Thinking about all the ads you've ever seen, which stands out to you as the v-e-r-y best? Which stands out as the v-e-r-y worst? Provide links to both.

Answer the following questions, making sure you incorporate relevant advertising/communication principles in your answers.

Best: What year did it first run? What makes it top your list?

Worst: What year did it first run? What would you do to make it a better ad?