Public interest publicity is worn to make the spectators aware of different events or problems and the most common ones are related to alcohol, violence and animal rights. Many people are perturbing about our environment, health and human relationship etc. The purpose of a standard advertisement is to market a product, a public service ad is intended to change the public interest, by raising consciousness of a matter, potentially motivating action and moving public attitude. In this article I collected 13 great examples of ads made by some of the most advertising agencies from around the world for your inspiration.