An AAAA record is an Internet protocol address within the freshly presented IPv6 format and it is comprised of eight groups of hexadecimal digits, unlike the IPv4 IPs, which include four groups of digits in between 1 and 255. An example of an IPv6 address would be 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and with this format the sheer number of IPs that could be created is many times higher than the number of the IPv4 addresses. Each domain has its hosting server IP address as a record and in essence, this record tells the domain name where the Internet site for it is. Depending on the system the service provider employs, the record will be called A (IPv4) or AAAA (IPv6). Changing this record will allow you to host your site with one company and your emails with a different one, so if you decide to use such a redirection to point a domain to a server that uses an IPv6 address, you will have to create an AAAA record for it.