Microsoft 365 security Home page and Incidents page now include a trend graph of all the incidents and alerts over the last 24 hours.
This enables you to easily find spikes in your environment and tell if there anything abnormal happening.
The new incidents trend graph view will also allow you to determine if there are several alerts for a single incident or that your organization is under attack with several different incidents.
For example, a will usually generate a lot of alerts in your organization and all of them will be related to the same incident. Seeing that there are hundreds of alerts over time related to the same incident can help you understand that there is an emerging attack that is growing so that you can prioritize your incident response.