This chapter aims to analyse the importance of knowledge management in quality assurance within library and information services. As demonstrated by the conclusions of Chap. 1 , the implementation of knowledge management in libraries is intended to support their development and competitiveness. Knowledge management (KM) represents a managerial strategy of primary importance in enhancing the relevance and quality of library services within today’s knowledge-based society. In practice, the two managerial strategies—knowledge management (KM) and quality management (QM)—often overlap. For example, ensuring access to high-quality research materials and promoting knowledge sharing through the use of advanced digital technologies are central to both approaches. These strategies are closely interrelated and operate synergistically in the provision of fundamental library services related to information and knowledge transfer.