When using public Wi-Fi networks, individuals can become vulnerable to data interception and snooping if they don't use a Virtual Private Network (VPN). A VPN adds an extra layer of protection by encrypting internet traffic, making it difficult for others on the same network to intercept sensitive information. This includes protecting against hackers, ISPs, and websites that may not have HTTPS encryption. By routing packets through a third-party server, VPNs mask IP addresses and make it appear as though data is coming from a different location, allowing users to bypass geographic restrictions or censorship. However, VPNs do not provide complete anonymity, nor do they protect against other threats such as malware or phishing attacks. When choosing a VPN service provider, it's essential to look for one that offers transparency, clarity, and a solid reputation, with features like ad-blocking and jurisdictional control. Ultimately, using a VPN provides an additional layer of security and privacy when on unsecured public networks, but it should be used in conjunction with other security measures.