User blog comment:MachineGunSuper/Help/@comment-32876686-20171214193920

Although Googology is said to be about the study of large numbers, it is more accurate to say Googology is about the study of fast-growing functions, and although there is no way to fit the decimal expansion of most Googolisms within the observable universe, there do exist methods of determining which numbers are larger than other numbers as a result of the functions being used.

If you want any specific examples I'll share them with you, and feel free to ask questions of course, in fact, this site has a help desk just for this.