The paper elaborates the topic of social network influence on the improvement of the CRM system. Nowadays, companies are aware that it is not enough just to attract consumers but it is of great importance to keep and to achieve long-term relationship with them. Elements in which social networks can enhance the CRM system are easier identification of potential consumers and/or business opportunities, identification of important knowledge, easier communication with existing consumers, easier collection and unification of data and creation of required knowledge, and easier tracking of specific factors (experiences, reports, warnings) in which rapid response is the key. In the paper, the content and the core components of CRM are defined as a system that allows establishment of consumer relationships, collection and recording of information and knowledge about consumers, providing information and support to consumers, and finally building and maintaining customer relationships through social networks. Social networks are also defined, as well as the correlation between social networks and CRM. The examples in which social networks improve CRM from the aspect of identifying, attracting, retaining, and developing consumer relations are pointed out as well. Methods for collecting data from different social network platforms such as Facebook, Twitter and LinkedIn are explained also for the purpose of improving the CRM systems.