IPv6 is the next generation Internet Protocol (IP) address standard that will supplement and eventually replace IPv4, the protocol most Internet services use today.
An IP address is basically a postal address for each and every Internet-connected device. Without one, websites would not know where to send the information each time you perform a search or try to access a website. Yet, hundreds of millions of people are still to come online, many of whom will do so in the next few years. IPv6 is what will allow them to do so, providing enough addresses (2128 to be exact) for everyone and all of their various devices.
To allow the Internet to continue to grow and spread across the world, implementing IPv6 is necessary.