You may find this series of steps familair. Perhaps this is how you also access the internet.
Using the internet this way is sort of like you going to your friend, Webster, directly and telling him your message.
What's wrong with that?
This is the part where the illustration starts to break down. When we want to give our friends a message, we don't usually want to keep them from knowing we are the ones who sent it. We also don't usually worry about who else can see or hear us.
However, when we access the internet, and we send messages to our friends, they aren't the only ones who see them. Other people we don't know see the message and see that we are the one who sent it. Some of these people are your internet service provider and the website you are visiting. They also include any third parties that the website and your ISP allow to listen in.
So...to prevent them from seeing our messages and knowing who we are, we need the internet equivalent of Victor from the illustration. We need a VPN.
Just like Victor, the VPN goes to the website (Webster) and gives it our message. Since the website only sees the VPN, it does not know about us. Just like Victor is the only person Webster sees. And finally, the VPN encrypts our connection to it so that our ISP can't monitor our browsing behavior.