I am a Microsoft certified professional with over 15 years of experience. I specialize in Application Services around SharePoint, SQL Server, Office 365, and .NET development.
One of the most complicated, and most used features of Microsoft's SharePoint Server is User Profile Service. Without a healthy user profile service, many features across SharePoint do not function correctly, or don't function at all. A health check will ensure that your UPS is functioning correctly and that all components are performing correctly.