Custom Events offer developers a way to track user or system actions that matter to their business or observability objectives. For example, a developer may want to track an end-user action such as selecting a button, submitting a form, or completing a purchase. These events can be sliced and diced in Application Insights Experiences including the Usage Analysis Views. Custom Events have long been a staple of Azure Monitor Application Insights. Now that they're available in the Azure Monitor OpenTelemetry Distro, it removes an impediment to migrate to OpenTelemetry.