The older the product, the more difficult it can be to find new ways to advertise it. Still, such a tough challenge may inspire brands to find a truly great solution—and it has been the case with Post-it notes, owned by the 3M Company, which launched a new US campaign under the “Go ahead” tagline. The new multi-platform promotion, which was devised and developed by Grey New York, plays around the totally new approach to advertising the iconic notes. Now, they are much more than just bright sticky pieces of paper for writing reminders on—they are tools for the self-expression.