The history of social reading is presented at the beginning of this paper, with what purpose it takes place, why it is important in today's world as we know it and at what point reading actually becomes social. The following are various forms of social reading, showing how technology has influenced their development and the benefits of the emergence of virtual reading clubs created under the influence of technology. This is followed by a chapter on social tagging and tags, which are one of the three components of the social tagging process itself. There is also talk of different behavior of users during the process of social tagging, without which the same process would not be possible. The advantages and disadvantages of this process are stated and explained, and why it is important to involve users in the organization of knowledge sources. The concept of folksonomy is introduced in the next chapter, as well as the definition of three types of folksonomy that we can distinguish. The term "cloud tag", the term narrow and wide folksonomy and its task are also explained. The LibraryThing and Goodreads network systems are described in more detail as an example of social tagging by providing basic information on their functionalities as well as cataloging and use of tags on these network systems, and finally what the use of tags results in and how similar these two social tagging systems are.