What is a Googol?
Basically, a Googol is a very, very, very (I can't emphasise this enough), very large number. It is 10100. Writing it out is already a pain, but here it goes:
1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000
That wasn't so hard. It is just a 1 followed by 100 zeros. Actually it's nothing more than that, but there is a bunch of interesting information to be found on the wikipedia page. Or if you're more visually inclined, check out some videos on youtube. There is a lot!