Marketing and marketing activities are becoming increasingly significant in modern terms of business which are constantly changing. In order to keep up with these changes, companies need a quick and reliable way of monitoring them. The companies perform audit and implement internal audit and control in their day to day business. Therefore, if a business wants to stay competitive in the marketplace a review of the entire marketing concepts is needed. That kind of review is called marketing audit and it is becoming important for marketing-oriented businesses. Consequently, this master thesis will address the role and importance of marketing audit that includes all main marketing activities which is needed for management because of unstable and changeable market environment. The goal of this thesis is to define any existent problems in business by implementing marketing audit and suggest corrective actions to improve business activities and revised product. According to research, conclusion is that observed company offers a wide range of products, it has a structural and specialized sales teams and successfully follows technological trends. Also, and not less important, a company has a very secure system of internal controls. The Vivax brand is not yet sufficiently recognized by customers and the company needs to work on it positioning in the minds of consumers. A users of Vivax air conditioners are ultimately satisfied with the product and we can easily conclude that the price is definitely their biggest advantage.