An AAAA record is an IP address within the newly launched IPv6 format and it is comprised of 8 sets of hexadecimal numbers, as opposed to the IPv4 IPs, that include four sets 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 amount of IPs that may be created is many times bigger than the number of the IPv4 addresses. Each domain has its website hosting server IP address as a record and in essence, this unique record informs the domain where the Internet site for it is located. Depending on the system which the provider employs, the record will be called A (IPv4) or AAAA (IPv6). Changing this record will allow you to host your website with one provider and your emails with another, so if you choose to use this sort of redirection to point a domain name to a server that uses an IPv6 address, you'll have to create an AAAA record for it.