Like other streaming services, Hayu has licensed its content from copyright holders and publishers. These agreements limit where Hayu is allowed to broadcast its content.
When you enter a region or country where Hayu is unlicensed, it uses your IP address to automatically block you. As a result, you will see an error message.
A VPN works by giving you an IP address overseas. When you connect to a VPN server in a region that is licensed to show Hayu content, you can instantly log in and start using your account again. This is why a VPN is such a useful tool.
Best of all, a VPN also provides privacy, which means that no one can detect what you do online. This allows you to use the internet freely and without government snooping or surveillance capitalism.