Whether you work online from your home or office, you must keep your online activities private. You won't want any third-person prying eyes on your online activities. To protect your cyberspace from threats and prying eyes, a VPN is a great tool. While using public wifi, you should always be careful. Attackers can fool you into exposing your credentials via phishing. In general, to gain your information, they only have to trick your device, not you.
If you use a VPN, your online traffic will be encrypted, hence preventing information breaches. Besides that, some websites constantly spy on you, such as Google and Facebook, keep their users' location and behavioral patterns for targeted advertisement.