A virtual private network, better known as a VPN, protects your identity and browsing activity from hackers, businesses, government agencies, and other snoops. When connecting to the internet, your data and IP address are hidden by a type of virtual tunnel. This keeps others from spying on your online activity.
A VPN is usefull when connecting from plublic places like a coffe shop, library, hotel lobby.
When you switch it on, a VPN creates an encrypted tunnel between you and a remote server operated by a VPN service. All your internet traffic is routed through this tunnel, so your data is secure from prying eyes along the way. Because your traffic is exiting the VPN server, your true IP address is hidden, masking your identity and location.
Yur connection to the outside VPN server and the encryption of your data — helps keep your browsing private. The only people who will know what sites you visit or links you click are you, your VPN provider, and the people or companies running the sites you visit
There are many VPNs you can use.
The answer is "It depends".
It depends on wether you are on a public network that cannot be trusted and you want to keep your private sensitive information safe.