The dashboards present data about which users or services performed activities in the subscription and the activities' status.
Activity logs you send to a Log Analytics workspace are stored in a table called AzureActivity.
Activity log insights are a curated Log Analytics workbook with dashboards that visualize the data in the AzureActivity table. For example, which administrators deleted, updated or created resources, and whether the activities failed or succeeded.
Visit Azure Activity Logs Insights for more information.