An AAAA record is an IP address in the recently presented IPv6 format and it comprises of eight sets of hexadecimal digits, as opposed to the IPv4 IPs, that include 4 sets of digits in between 1 and 255. A good example of an IPv6 address is 3014:0d43:23a3:2354:1320:8f3b:2635:3254 and with this format the total number of IPs that may be created is many times higher than the number of the IPv4 addresses. Every single domain name has its hosting server Internet protocol as a record and in essence, that record informs the domain where the site for it can be found. Depending on the system the company uses, the record is going to 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 type of redirection to point a domain name to a server that uses an IPv6 address, you'll need to create an AAAA record for it.