This Thematic Brief explores the main concepts, debates and experiences from policy and research initiatives related with micro-credentials and their contextualisation in the frame of education and training systems, national qualifications frameworks, new eco-systems of certification, upskilling and reskilling to meet the needs of the digital and green transitions and employability in a context of skills shortages. The attention to micro-credentials in the research and literature, and in policy documents has increased in 2020-2022, as countries, regional communities, international organisations explore features of a common understanding of trusted and relevant micro-credentials. Chapter 6 looks into results of a limited ACQF survey (March 2021), which included a section on trends in micro-credentials.