In the Events tab you will be able to add events that are to be tracked as part of your experience. Once the events are added then there respective statistics will be availble in the Events Insights.
Events can be used to track:
Unique count: This count keeps track of unique users who triggered this event. For example, if a sign up button is considered as an event, then how many unique user clicked on sign up button.
Total count: This count keeps track of the total number of times the event was triggered. For example, if a product view is considered as an event, then the number of product views gives the total count of the visitors.
In Events tab you will also be able to remove events from the experience.