Windows 10 (as well as Windows 8) provides users with two ways to access settings, the traditional Control Panel with access to various functions and tools, as well as the new Modern UI Settings app. The former is the more advanced option, but Microsoft is moving away from the familiar Control Panel in favor of the Settings app.
According to Microsoft's Gabriel Aul, the company plans to replace the Control Panel with the Settings app "in time", slowly migrating across the numerous tools.
Unfortunately, should you be a fan of the Control Panel after all these years, the Settings app will become the new portal to manage your Windows PC. It isn't known just how long it will take Microsoft to make the Control Panel entirely redundant. Have you grown attached to the Control Panel, or are you backing said change?