Apple Event
In short
An Apple event is a message-based communication system used in macOS to allow different software applications to talk to one another.
In plain words
It lets one app tell another app to do something specific. Instead of just clicking buttons, one programme can send a command to another to perform a task.
A simple example
You can use a script to tell a music player to play a specific song while simultaneously telling a calendar app to create a new appointment.
Why it matters
It is the foundation of automation on Mac computers. It allows users to create complex workflows using tools like AppleScript.
Easy to mix up
Do not confuse this with the marketing presentations held by Apple Inc. to announce new products.