At this point, you might be wondering why IPv6 even exists.
Well, while the 4.3 billion potential IP addresses in IPv4 might seem like a lot, we need a lot more IP addresses!
There are a lot of people in the world with a lot of devices. This is an even larger issue with the rise of IoT devices (Internet of Things) and sensors, as these greatly expand the pool of connected devices.
Put simply, the world was running out of unique IPv4 addresses, which is the biggest reason why we needed IPv6.