This thesis defines the concept of marketing channels and the relationships within them. How important marketing channels are, what is their structure and what levels and types of channels exist. It seeks to define power in marketing channels, what it means and how important it is in business. In addition to channels, the topic of information technology, which is greatly changing the market trend and is becoming increasingly important in modern business, is also discussed. What information technology really is, what its role is and how many companies have started to apply it can be realized. The influence of the Internet on business and the role of social networks are also analysed, and the Internet is defined as a modern marketing channel. What the impact of information technology on relationships within marketing channels is, if it affects business in the modern economy, and if companies are forced to adapt to information trends in order to achieve competitiveness. In addition to all of the above, it seeks to discover whether the information technology affects promotion and in what way. Along with defining marketing channels and information technologies, the paper defines and analyses in detail a new technology that is yet to reach its peak - RFID technology. The paper describes in more detail the research conducted, based on secondary data, that explains how RFID technology is applied in individual companies. The impact of this technology is explained separately for several chosen companies of different activities. The problems of all concepts mentioned are also presented in the paper.