This thesis examines the problem of evaluating the effectiveness of digital marketing; more specifically it looks at the topic of Pay-per-click advertising on the scope of Small and Medium-sized businesses in the Czech Republic. The thesis provides literature review of the historical and current possible practices of what specific measures can be used to evaluate the success of pay-per-click advertising. Moreover, it connects the measurement subject with the associated area of attribution modeling. This topic represents an important issue for the online marketers mostly because of a currently widely used last-click attribution model that is not able to attribute the fair value of the different channels on the consumer journey to purchase. T...