I have read from a few 'best practices' guides that every SQL Server administrator/DBA should configure their production instances to alert on any events with "severity levels 19 through 25". However, I am trying to grasp exactly what those events relate to, and translate that into something meaningful to senior management as to 'if you dont get alerts on these events - this could be the consequences... for those who do use SQL alerting, do you capture these events, and to be blunt "why"?