Interviews are a key method for obtaining first-hand information and field data on any aspect that is of interest. If well-conducted and properly analysed, interviews can significantly advance understanding of complex issues. Various formats exist: An in-depth interview captures how people value or understand something. In a semi-structured interview the researcher interviews individuals, small groups or households using a checklist of issues or topics (not a questionnaire) to guide their discussions. In a structured interview a questionnaire is used which guides the conversation and limits the scope of responses accordingly. This method profile focuses on qualitative (in-depth/ semi-structured) interviews: They deliver insights into people’s experiences, knowledge, feelings and understandings of the ecosystem in focus.