This diploma thesis is focused on internet and mobile advertising and its usage in promoting the Qool.cz project. The beginning of thesis is dedicated to general possibilities of using mobile advertising, possible payment methods and advertising formats. Throughout the whole thesis, there is a focus on three main parts of the mobile environment - mobile web, mobile applications and mobile advertising. Practical part of the thesis focuses on using all these methods in promoting the Qool.cz project. The secondary goal of this thesis is to present a high-level perspective on using mobile technologies in a marketing mix.