Presented bachelor thesis deals with the personalization phenomenon, particularly in the E-Commerce environment. The aim of the thesis is to identify personalization methods and their applications in E-Commerce and to characterize their usage in chosen categories of E-Shops in the Czech Republic. The thesis introduces the structure of possible relations between personalization methods and their applications on the basis of presented characteristics. Methodology presented in the text is used in the current state of use of the personalization methods and applications analysis. The main contribution of the thesis is the definition of the basic terms and their relationship in a chosen field as well as providing a report of the personalization u...