This bachelor thesis is about marketing on social networks. The thesis is initially focused on various social networks and then of course on the using of marketing and advertising on these social networks. This thesis is also about selection of a suitable marketing strategy for social networks and analytic tools for measuring of the success of campaigns on these networks. The end of the theoretical part is focused on the past marketing campaigns on social networks. This thesis compares and evaluates the effectiveness of several advert sets on the social network Facebook. Each of these advert sets took place one week and measurements were made in the analytical tool from Facebook. At the end of the thesis there is a questionnaire, in which ...