Event conversion rate measures how many people complete a desired step, such as visiting the registration page and submitting the form.
Conversion rate measures how many visitors complete a desired action, such as registration checkout. For event marketing it links landing page traffic to ticket sales.
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.