A VPN (or virtual private network) is one of the most powerful digital tools to be safe online. Any third party (a government, hackers, your ISP, or other corporations) will not e able to invade your privacy by looking at what you do online.
When you are online through a VPN, your traffic is encrypted, your IP address is hidden, and everything travels in a safe tunnel to a remote server in your VPN’s network. In addition, the VPN will show the world an IP address based on the country in which your server is located. Thus, you are virtually in that country, allowing you to get around censorship and geographical blocks.