DNS is the component of the Internet which converts human-readable domain names (such as example.com) into computer readable IP addresses (such as 126.96.36.199). It does this according to DNS zone files that reside on your server and tie domain names to IP addresses.
There are several different types of records in a domain's zone file. This feature allows you to create, edit, and delete A, CNAME, and TXT records.
How you can find Advanced Zone Editor :
Find "Advanced Zone Editor" under "Domains" Category in cPanel.