it's a number it looks like this: 10^10^100 and googolplex is a number it is higher than the number of hydrogen atoms in the observable universe! scientist use googol for rocket science!
EDIT:
10^10^100 is a googolplex, not a googol.
A googol is 10^100 whereas a googolplex is 10^googol
Its use, however, has no mathematical significance. A googol was pretty much invented for fun by a mere 9-year old.
Oh, dude, a googol times a googol is basically a googol multiplied by a googol. And a googol is like 10 to the power of 100, so when you multiply that by another googol, you're basically getting a number that's like really, really big. Like, so big you probably won't ever need to use it in real life.
googol is the number 1 follwed by 100 ie 10 power of 100
2 googol
googol and one, googol and two, googol and three...
There are (googol+1) of them.
Googol can be written as googol or 10^100.
One googol and one would be next after one googol.
A googol one, googol two, googol three, ...
A googol has 100 zeros. A googolplex has a googol of zeros. 1 googol is 10100. A googolplex is 10googol .
A googol is 1 * 10^100. a googol times a googol is: 1 * 10^100 * 1 * 10^100 = 10^100 * 10^100 = 10 ^ (100 + 100) = 10^200. Therefore a googol times a googol will have 200 zeros in it.
Since one googol equals 10100 (1 followed by 100 zeros), googol times googol equals 101000 (1 followed by 1,000 zeros).
A googol is 10^100. A googolplex is 10^googol