To ensure more qualitative social services for youth, the offerings should meet the demand based not only on statistical data but also on the characteristics of youth itself, from the perspective of classical developmental psychology theory. As a result, social services will become more relevant and personally meaningful. Based on the transition from childhood to adult life in adolescence, the characterization of developmental psychology identifies the quality of social services provided to young people in one of the European Union countries. The structure of the article is based on answers to 2 research questions: (1) What are the characteristics of adolescence from the perspective of developmental psychology? (2) What defines the quality of social services for young people in one of the European Union countries? Empirical research on regulatory acts governing social services aimed at youth and their quality and organise an expert interview. Trends in socialization, various ideological currents, and the rapid digitalization processes significantly influence the classical characterization of adolescent developmental psychology. The lack of a unified approach to defining and evaluating the quality of social services for young people results in the episodic nature of the services offered. Moreover, the lack of inter-institutional collaboration impacts the prevention aspect of social work.