Best-Seller Association is a voluntary, non-governmental, non-partisan, and non-profit organization dedicated to the development of civil society and civic values. Established in January 2014, Best-Seller offers a wide range of programs and services aimed at personal, professional, and social development. They run four main programs: the Personal Development Program, the Professional Development Program, the Social Development Program, and the Tight-Knit Program.

Under the Personal Development Program, Best-Seller conducts projects and activities that improve self-awareness, enhance the quality of life, and help individuals identify and develop their strengths and talents. The Professional Development Program focuses on building knowledge, improving transversal skills, and facilitating employability. The Social Development Program deepens understanding of social and political relations, supports active citizenship, and promotes social interventions and inclusion.

Lastly, the Tight-Knit Program focuses on entrepreneurship promotion and the creation of socially agreed and progressive values through textile processing and designing. Best-Seller Association also advocates for responsible public policy, supports activism, and encourages cooperation and innovation. Their ultimate objective is to promote sustainable development and the development of civil society at the local, regional, European, and international levels