Digital technology is nowadays more and more required for both normal everyday life as well as the working one. The ability itself to work with a computer is just a marginal matter in today's concept of digital literacy. Technology is constantly evolving and requirements for digital literacy are increasing. The concept of digital literacy has emerged together with the growing trend of digital technology in our society. Digital literacy influences the quality of personal life. Internet has a great impact on social life. Due to the use of Internet the number of social contacts increases with greater diversity. For example, a combination of mobile phone and Internet creates new forms of family cohesiveness that are based on greater mutual contact, better co-ordination of mutual activities, sharing of topics, experiences, photos and other information. The development of digital literacy is therefore important for parents and grandparents in today's position when communication between children and grandchildren moves largely to Internet. The paper is based on the study of the approved TAR project (Technological Agency of the Czech Republic) and the currently implemented project for the support of applied social and humanitarian research, experimental development and innovation of ETA at CTU MIAS, Masaryk Institute of Advanced Studies, Czech Technical University in Prague.