Trade fairs represent a hot subject in the contemporary theory, as well as in the contemporary practice of modern successful international and local enterprises, organisers and owners of exhibition space. The domestic literature provides certain sources and papers which discuss the topic in theory, but there is an evident lack of strategic approach towards trade fairs as the instrument of sales improvement, as well as the obvious lack of practical approach of enterprises at trade fairs, and the lack of real measurement of the results obtained. This paper proves that the representation on a trade fair had positive effect on the sales results, as well as on the creation of interest and the increase of awareness of the existence of a company and its products. The analysis proves that under certain conditions the gain rate on the investment is calculable and quantifiable, in the case of trade fair representation.