In web analytics, particularly with Google Analytics, an event is an action performed by a visitor on a web page that is not automatically recorded in analytics reports. Most events occur within the page itself without requiring the user to leave or reload the page. For example, an event might be downloading a PDF file, clicking an external link, submitting a form, watching a video, using an interactive filter, zooming in on an image, and so on. Tracking and analyzing events on a page or website can be crucial for understanding user behavior and evaluating return on investment. For instance, for a B2B company without online sales, monitoring downloads of a catalog or PDF order form can be essential. Effective event tracking and analysis requires the implementation of a specific monitoring system.