The topic of the final work is media and media relations. The process of communication and its media has been defined, the main types of media are described and why it is important to carefully choose the right way of communication when trying to send message to recipients. The media's impact on the world and the importance of media relations are topics on which is most concerned when it comes to the media. The influence of the media on society in the 21st century has been analyzed, how effective it is to use media in everyday life, such as education, entertainment, leisure and business, and whether there are consequences in using the media. The media alone, have a great impact on society and largely serve to connect the world. By developing technology, it is easier and faster to convey news across the Earth, and in the future, even more so, enabling easier access to desired information. Everyone has the right to information and freedom of speech which is of utmost importance. However, media often have a negative impact on society, especially children, exposed to inappropriate content and greatly affecting their behavior. In recent years, television addiction is increasingly common, resulting in excessive television viewing, but also the use of the Internet.