You idiots just make these names up and expect it to have some definition set in stone. There are 3 types of haki. Each one can be practiced and learned to control better but it's a spectrum not some stupid leveling up system. There is no advanced conquers haki EXCEPT in relation to someone else's lesser conquers haki. For example, shanks' control of his haki is more advanced than luffys' control of his haki. Mihawk has a more advanced understanding and control over his haki than zoro does. Luffy and kaido both have a more advanced understanding and better use of their observation haki than katakuri. Shanks control of his haki is more advanced than anyone else we've seen this far, that doesn't mean he has some stupid new type of haki you can make up a stupid acronym for, he just has the same 3 types of haki and knows how to use them better.