An "event" refers to a specific action or interaction that a user takes while browsing a website or using an application. When a user undertakes an event, such as a pageview, purchase, subscription, or click, Bisko stores information about that event in its database. This information includes data points such as the URL of the page viewed, the device type used, the timestamp of the event, and any other custom data points that you have defined as relevant to that event.