Business communication includes elements such as business correspondence, rules of dealing with other people, business dress code, voice tone and body language, use of words and rules of having a polite conversation in various business situations. From the above we conclude that business communication is the basis for successful business of each company. The definition of communication is precisely what gives us the importance that the exchange of ideas, emotions and messages between two or more parties is understood in the same way, whether it is intra-company communication or company communication with customers, suppliers and other external customers. This paper defines business communication with an emphasis on modern communication, ie communication through social networks. Social networks are in fact the initiator of a new trend of product promotion and sale, but also a media of communication for businesses, public figures and even for the Government of the Republic of Croatia, which seeks to approach its citizens through open communication on social networks.