Short answer: A proxy server for wifi masks your IP and can help with privacy/security. Long answer: It can also log your data if you pick a shady one, so choose wisely.
For public wifi, I’d recommend a VPN over a proxy (like ExpressVPN), but if you just want basic protection, Hola VPN’s free proxy mode works in a pinch.
For public wifi, I’d recommend a VPN over a proxy (like ExpressVPN), but if you just want basic protection, Hola VPN’s free proxy mode works in a pinch.