Nowadays, lifelong learning is an integral part of everyone's everyday life. Lifelong learning ensures the progress of society with regard to a wide range of applications. The main purpose of this paper is to show the development of lifelong learning through a theoretical framework and feature its relevance to personal life. Furthermore, it presents knowledge as one of the strongest tools that every individual possesses. Education makes it possible to adapt to all modifications taking place in the 21st century. Every member of modern society should be willing to learn throughout his life, because knowledge and skills acquired during childhood become obsolete very quickly. In the concept of lifelong learning, there is a greater emphasis on non-formal and informal learning, than on formal, for the reason that the formal form of education has been the only way of acquiring knowledge so far. Continuity of learning represents lifelong learning in various places through non-formal or informal education that encourage personal development and the development of numerous potentials in each individual. In the context of lifelong learning, we are talking about a learning process that never ends and lasts as long as a person lives.Given that changes in the world and society are happening at an incredible speed, it is the concept of lifelong learning that guarantees the progress of society and encourages personal development and prevents the rut of an individual's life. Lifelong learning has become a key part of any educational strategy. Globalization constantly brings new challenges, therefore the importance of lifelong learning is tremendous because it ensures active citizenship and a better future in general for the whole world. In conclusion, the concept of lifelong learning has taken root in Croatia and the adult population understands that a positive attitude towards life includes the same.