IPv4 (Internet Protocol Version 4) addresses are stored in an easy to read 32-bit format, making it easy to configure home networks and routers. For example 192.168.0.1 is a IPv4 address and so is 220.127.116.11
IPv6 is designed as a replacement for IPv4 as IPv4 only had a limited number of public address available. IPv6 is a 128-bit format that is written as a hexadecimal and can be written like 2001:4860:4860::8888 or 2001:4860:4860::8844.
IPv6 would only affect your public facing address for now as everyone is assigned a unique number when you go online.