Cette application n’est pas validée

Hi Postman team,
When I grant authorization to Google and I connect to my google account it displays a page telling me “This application is not validated”. This page displays the following message:
“We have not yet reviewed this application and cannot confirm its authenticity. Unvalidated applications may pose a threat to your personal data.”
So by clicking on the advanced parameters I can authorize access to the application.
I don’t understand why google wants to check this app? Can you explain to me why? And what should I do to no longer have this verification request?
Thank you in advance for your explanations.
Richard.

The page I need help with: [log in to see the link]