What a VPN does do is make it much harder for an attacker to simply hoover up your information along with hundreds or thousands of others. That alone can help protect you from many of the large attacks and mass surveillance that have defined the last few years. Digital security, after all, is often really about economics. Spies and attackers would much rather go after the low-hanging fruit than try to crack or circumvent a VPN connection. Just remember that using security tools isn't an excuse for not also using a healthy dash of common sense.
Are you so used to your data traveling over Wi-Fi that you've stopped worrying about the security of that data—and about who else might be spying on it, or even stealing it for nefarious purposes? If so, you are—sadly—in the majority, and you ought to consider using a viritual private network, or VPN. In fact, when PCMag conducted a survey on VPN usage, we found that a dismal 71 percent of the 1,000 respondents had never used a VPN. Even among those who support net neutrality—who you might think would tend to be well informed on technology and privacy issues—only 45 percent had used a VPN.