As a traveler, if you use the internet a lot while you travel, you will have to connect to so many unfamiliar networks at the airport, in your hotel room, at the coffee shop, at the shopping mall, or in restaurants. Cybercriminals can hijack the hotspots you connect to, and your device can get hacked with sensitive information stolen.
With the help of VPN servers, data going out of your device is encrypted, and no one can intercept or decipher it. If you are traveling to a country where the government regulates website use, you can use a VPN to bypass the restrictions on apps and websites. Some regions have locked content, which makes it hard for you to access unless you are in that region. With a VPN, you can access such content without being physically present in the country.