The role of science has always been vital in terms of the progress of civilization and society. Its development throughout human has improved life conditions by way of enhancing economic security. The scientific research encourages development of new skills that can be communicated to everyone. The theoretical part of this study dwells upon the development of science, scientists and the birth and importance of scientific communication. Taking into consideration its role in all fields of human activity, its impact on library and information sciences is quite obvious. Development of a profession relies heavily on the exchange and acceptance of new ideas and achievements, whose implementation in the form of research work makes it accesible to the general public. The publication of works is just as important as their interpretation, for without the reader there could be no spreading nor implementation of new elements into the existing spectrum of knowledge. The paper deals with scientific and expert magazines and newsletters from the field of librarianship and information sciences published in Croatia. These publications make it easier for librarians to access information, and it is through the familiarity with the work of fellow colleagues that the professional community is strengthened. Constant participation in the development of the profession fulfills the conditions for advancement, prescribed by the Ordinance on the conditions and methods of obtaining professional titles in the librarian profession from 2021. Along with the change in the librarian nomenclature, it introduces a change related to the possibility of advancement, which until then was offered only to persons employed in the position of a librarian. From 2021, professional advancement can be achieved by all professionals employed in libraries. The second part of the paper analyzes the results of the research carried out under the title Advancement in the profession and publication: attitudes and motivation of employees in public libraries, the aim of which is to find out the familiarity of employees of public libraries in Croatia with the changes in the Ordinance on the conditions and methods of obtaining professional titles in the library profession, and what kind are their motivation and the possibility of publishing professional and scientific papers in order to achieve the conditions for advancement in the profession.