How do VPNs work?
When a device is connected to a VPN, all the data between it and the internet becomes encrypted. This makes it difficult for the packets to be tracked and or read through a third party witness. This encryption works both on private and public wifi connections. Additionally, when connected to a VPN, the IP address of the device gets manipulated to make it appear that the device is in a different geological location than where it actually is.
What are VPNs used for?
There are many reasons that someone may use a VPN but these are the main ones. They are mainly used for security purposes in the sense that they encrypt data and allow for a more confident use of a public network. Additionally, some people may use a VPN to access web services that are restricted due to geological location. By having an obscured IP address that allows for your device to appear being in a different location allows for a user to access those restricted services. VPNs are also used when accessing sensitive information because of the extra layer of security, which is heavily used by journalists and activities seeking information online. Finally, VPNs can assist with bandwidth stretching due to it hiding your online activity from the internet service provider which could slow your internet connection down depending on what you’re doing (i.e. streaming video games).