The subject of this paper is Mobile Messaging Apps that are used for written communication among the student population, their influence from the social aspect in terms of interconnectedness of students and the linguistic aspect of online communication. The objectives of the paper are to explore the impact of Mobile Messaging Apps on the effectiveness of communication, to examine the reasons for using Mobile Messaging Apps, to determine the knowledge of network jargon and its use, to examine the impact of oral and written communication on social relations and to explore the preferred form of communication. The research was conducted through an online survey involving 132 students of Professional undergraduate study and Specialist professional graduate study of Marketing and Communications on Zagreb School of Business. In addition to this research, the theoretical aspects of youth communication in modern society have been studied, as well as literature related to the use of new media and new communication channels. The results obtained by the study confirmed the main hypothesis according to which Mobile Messaging Apps have a significant impact on the effectiveness of the communication of the student population. Almost all respondents have recognized the potential for misunderstanding during communication through the Mobile Messaging Apps. It has been confirmed hypotheses that most students use Mobile Messaging Apps for sending messages, and less for the purpose of the call, as well as the basic reason for use - they are free of charge and uncomplicated. Furthermore, the students confirmed hypothesis that the use of the network jargon is based on a faster, easier and simpler expression of emotions and attitudes. The hypothesis that oral communication contributes to the creation of deeper connection, in relation to written communication through Mobile Messaging Apps, is fully confirmed. The last hypothesis concerning the selection of a telephone call as a preferred communication channel for transmitting important information is also confirmed. More than a third of the students would in that case give a call, so they could pass important information through oral communication rather than through the message. The research shows that the student population has recognized and accepted new communication media, using them according to their needs. They are aware of the advantages and disadvantages of both oral and written communication channels and could use the appropriate channel, depending on the situation they are in.