Explanation:
Without it, the opened page could access window.opener and redirect the original tab (tabnabbing). Modern browsers now apply noopener by default.

ALSO KNOW (related points):
• Which HTML element creates a description list of terms and their definitions? → (with and )
• Which table attribute makes a cell span 2 columns? → colspan="2"
• What does the sandbox attribute on an do? → It applies extra restrictions to the framed content (such as blocking scripts and forms) unless specific permissions are added