Advertising is a form of selling a product to a certain audience which communication is intended to persuade an audience to purchase products, ideals or services whether they want or need them. While advertising can be seen as a way to inform the audience about a certain product or idea it also comes with a cost because the sellers have to find a way to show the seller interest in their product. It is not without social costs. Unsolicited commercial email and other forms of spam have become so prevalent that they are a major nuisance to internet users, as well as being a financial burden on internet service providers. Advertising increasingly invades public spaces, such as schools, which some critics argue is a form of child exploitation. Advertising frequently uses psychological pressure