Dear Copycat,
Option is a financial instrument that is used to decrease( or increase- eg speculation) risk in the investments. It gives the 'buyer' of the option right but not obligation to buy (call option) or sell(put option) an asset on a particular previously decided date(eg european type option) or any date before expiry date (eg american type option).
you can obviously read more about it here
If you have any question pls feel free to ask.
@ others: my apologies if i made some techical mistake- take it easy on me its my first post ! :-)