How are deserts formed?

Someone tell me how deserts are formed.

Google it

I second Oblivion's suggestion.

You should google it first desmo. And then if you don't understand something, you could try asking people here about whatever it is you don't understand.

If you typed in "How are deserts formed" and that didn't really give you any understandable information, always try subsituting any words you can. Such as replacing "formed" with "made".