The document discusses measuring the impact of using digital technology for social change. It notes that short-term impacts are easier to track but longer-term impacts can indicate more significant impact. Impact assessment should measure social, user, economic, organizational, and technological value. Evaluation aims to measure and demonstrate value by understanding how change occurs. Effective measurement validates outcomes, uses one metric per phase, considers short and long-term measures, and only measures what is needed. Various methods to measure impact are discussed, including observed behavior, self-reports, expert reports, and biological measures.