VPN providers encrypt your information and hide your location from your internet provider. Using VPN at the airport or through public Wi-Fi can help hide your identity from cyber-attackers, especially with the current threat of ransomware.
This will not only encrypt all your communications, but you will also be able to hide your true location so that you will not be tracked.
Identity theft happens when someone has stolen your personal information. In a modern world, this information is more easily accessible, especially on social media sites. Identity theft will be a big problem for all travelers visiting foreign countries. Be careful with what you post about yourself, or any personal information you might disclose. The best place to start is by downloading a few VPN free trials and see which provider works best for you.