The main objective of the thesis is to analyze existing online marketing activities of the Music City, one of the major retailers with the musical and audio equipment in the Czech Republic, and in context with the defined objectives, to evaluate a usage of the specific online marketing tools. The thesis deals with the evaluation of the web site, paid advertisement via search engines Google and Seznam, paid advertisement and marketing communication through the Facebook social network, both internal and external e-mailing as well as the cooperation with the e-commerce corporations, Heureka.cz and Zbozi.cz. Based on the analysis and findings, recommendations for streamlining of the marketing tools usage will be suggested.