Participatory processes at the grassroots can have a powerful impact. But what happens afterwards to the learning and knowledge generated? Are these experiences translated into wider organisational learning, and if so how – or why not? And what impact do they have on decision-making or strategic planning within INGOs? This special issue of PLA explores how widely the impacts created from participatory processes spread from their original source. Following an initial overview, the 24 articles are divided into four parts: Part 1 looks at participatory communication practice and how the information is generated; Part 2 is about making sense of the dynamics of interpretation and use of participatory outputs; Part 3 is about learning in organisations and Part 4 explores structures, mechanisms and spaces.