An event KPI is a measurable indicator used to evaluate event performance, such as attendance rate, cost per attendee, NPS or pipeline generated.
KPIs align teams on what success means before the event starts. Without them, post-event reviews become subjective.
Teams define the metric and data source before the event, capture values with consistent methods, and review results with finance, marketing and operations in the debrief. Without that discipline, KPIs stay slide titles instead of decision tools.
Without a shared metric definition, events get judged on attendance anecdotes and strategic impact disappears in slide decks.