Most variables that you deal with contain one value. Sometimes however
it's useful to store more than one value. Arrays are one way to do this.
Since I can't come up with a good simple definition I'll turn to Microsoft's
definition from the VBScript documentation:
Array
A set of sequentially indexed elements having the same type
of data. Each element of an array has a unique identifying index
number. Changes made to one element of an array do not affect the
other elements.
For the rest of the details check out the code. It's easier to
show you this stuff than to try and explain it without an example
to refer to.