What is Hidden
When connected, your local network operator, ISP, and public Wi-Fi providers cannot see the URLs of the websites you visit or the data you send. They can only see that you are connected to a VPN IP.
What Remains Visible
Websites you visit can still see your browser's user agent, screen resolution, local storage cookies, and any account credentials you enter.
Recommendations
To build a stronger privacy boundary, clear your browser cookies regularly and use private browsing windows alongside your active VPN session.