The typeface keeps menus, buttons, and text labels aligned with the overall Windows 10/11 aesthetic, preventing a "foreign" look and feel [2]. Where You See It in iTunes Menu Bar: File, Edit, Song, View, etc.
By utilizing the default font of Windows (since Vista), iTunes feels more like a native app rather than an external program. Segoe Ui Font Itunes
Setting DPI scaling to 100% or adjusting "ClearType" settings in Windows to fix blurriness. The typeface keeps menus, buttons, and text labels
Overall, the use of in iTunes is a deliberate choice to provide a clean, modern, and familiar user interface to its massive Windows user base. To give you the most helpful write-up, could you tell me: Are you a developer trying to match the look of iTunes? Or are you just curious about the design choices ? Setting DPI scaling to 100% or adjusting "ClearType"
Segoe UI is designed for high legibility on screens, ensuring that library lists, song titles, and menu options are clear, even at smaller sizes [1].