I. Introduction:
Every day we can see a lot of ways to advertise to persuade us buying products. There are a lot of advertising methods to communicate with customers such as television, newspapers or even online advertising. A successful advertising is to manipulate customers’ decision and impression (Giles 2003). According to Kotler and Armstrong (2001), other tools to manipulate customers are sales promotion, public relations and sales promotion. Each tool has its specific ways to persuade customer. For example, when economy is going down, sales promotion is a good way