What's an Event? What's an Issue?

I want to understand the difference between an event and an issue in Sentry.

An event is a single piece of data sent to Sentry. Most commonly, this is an error or exception, but events can also contain other types of data, such as transactions.

An issue is a collection of similar events. Sentry groups related events together so you can investigate them as one problem rather than dealing with each occurrence separately. Events are typically grouped using their fingerprint, which often reflects where the problem originated in your code.

When that information isn’t available, Sentry may use details such as the exception type and value to determine how events should be grouped.

For more information about how Sentry groups events into issues, see the event grouping documentation.