The world is almost out of IP addresses — or at least the IPv4 addresses that IT admins and users are most familiar with. Fortunately, IPv6 has been developed to exponentially expand the pool of available IP addresses. The Internet Engineering Task Force (IETF) has introduced IPv6 (Internet Protocol version 6) to address issues with the current IP protocol in use (IPv4), and to add features to improve the protocol for the future. With 128-bit addresses, the world is rapidly approaching the end of the available IP address.”]
Source: https://www.csoonline.com/article/2125504/four-ways-ipv6-will-save-the-internet.html