Explain the advantages of application whitelisting?

What will be an ideal response?

Whitelisting helps prevent malicious code from being introduced into corporate networks. Application whitelisting comes in a few different forms, but ultimately it allows only approved programs to run on a computer. For example, programs such as Word.exe, Excel.exe, and Safari.exe would be whitelisted. All programs not on the whitelist would be prevented from executing on the user's computer, including that malicious program attached to a phishing e-mail a user clicks on.