This paper consists of five parts – the introduction, methodology, research results, discussion, and conclusion. The methodology explains the subject and the methods of the research. The subject of the research is the representation of the potential of Google AdWords advertising on mobile devices. The subject is first presented in theory, and then through practical examples, which is why both primary and secondary data sources were used in this thesis. The research results consist of four subchapters. The introductory part shows how the Internet developed from a communication channel to a channel for sales and distribution and it also lists its advantages and disadvantages. The second subchapter defines mobile marketing, and it shows the theoretical overview and the graphical display of the growth of mobile marketing in the last few years. The third subchapter represents the following: the features of Google AdWords advertising, its advantages and disadvantages, key words, Google Analytics, etc. The last subchapter explains mobile advertising and the new way of advertising called Local search adverts, as well as the results of the real campaigns which were conducted in July this year. The results are shown on devices based on a few key metrics. The discussion leads to the conclusion and deals with the question of whether it is effective to advertise on mobile devices or not, and explains why the advertising should be continued on desktops as well. The conclusion represents the summary of the thesis. The thesis is recommended for those who have at least the minimum knowledge of AdWords advertising and are thinking about advertising their products and services online, but are not sure which type of advertising they should choose and which devices they should focus on.