The PS C:\> at the start of your terminal line is simply the PowerShell prompt telling you it is ready for commands.
Why it shows in Visual Studio?
It indicates that your integrated terminal is running Microsoft’s PowerShell scripting environment rather than the standard Windows Command Prompt (cmd) or bash.
How to switch from it?
Open the Command Palette using Ctrl+Shift+P, type Terminal: Select Default Profile, and choose your preferred shell from the list