why this error occurs 'git' is not recognized as an internal or external command, operable program or batch file. code example

Example: git : The term 'git' is not recognized as the name of a cmdlet, function, script file, or operable program.

{
    // Is git enabled
    "git.enabled": true,

    // Path to the git executable
    "git.path": "C:\\path\\to\\git.exe"

    // other settings
}