An AAAA record is an IP in the freshly launched IPv6 format and it is comprised of eight different sets of hexadecimal numbers, as opposed to the IPv4 IPs, which feature 4 sets of numbers in between 1 and 255. An example of an IPv6 address is 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and in this format the amount of IPs that can be created is many times larger than the number of the IPv4 addresses. Each and every domain name has its web hosting server IP as a record and in essence, that record informs the domain address where the site for it is located. Depending on the system that the provider employs, the record is going to be called A (IPv4) or AAAA (IPv6). Changing this record will allow you to host your site with one company and your e-mails with another, so if you choose to use this type of redirection to point a domain address to a server that uses an IPv6 address, you will need to set up an AAAA record for it.