Unconferences are informal conferences where the agenda is set by participants on the day of the event. They are low-cost or free events focused on active participation. They originated from open space technology used in tech industry meetings, with an emphasis on participant-driven discussions. Planning an unconference requires a venue, date, communication tools, and flexibility. The day involves generating session topics, note-taking, and encouraging sharing of ideas in a casual atmosphere. Successful unconferences create engagement through open-ended questions and continuing conversations after the event.