In the context of guerilla marketing, "Szonár" is a word-of-mouth hub, namely users get emotionally involved in products (or in their communication) being created under their influencing ideas, opinions, which is the basics of setting the WOM going. The website, www.szonar.hu, creates customer enthusiasm instead of forcing sales messages, and by reaching a few opinion leaders as well, it offers the power of WOM marketing to influence shopping decisions. The significance of ‘Szonár’ can’t be underestimated, the international experiences prove that in the end marketers will have two options: they either have control, or they will be controlled by the word-of-mouth.