It’s June 6th so if your ISP (and your hardware) support it IPv6 is here. In 1973 they specified a (then) large block of IP addresses (2^32 or around 4.3 billion). Welp, we ran out of those in February 2011.
The rapid growth of the Internet has led to the need for many, many, many more. To allow trillions of users to have their own IP address IPv6 was born which will offer 2^128 or around 340 trillion trillion trillion addresses. It’ll have enough space to give every insect on the planet a unique IP address. Here comes the Internet of Things, which is already bringing prototype smart utility meters, smart lighting, and other integrated devices into our households. Check out this link to see if you’re ISP/hardware support IPv6.
Vint Cerf’s. the father of the Internet and Chief Internet Evangelist at Google discusses why we need it.