No one knows for certain where the Tarot originated from. They seem to have appeared around the 14th Century. Some beleive they were carried by travellers. There is evidence of the tarot being used in the 14th Century court as a means of fortune telling for the then King of France.
When completing a reading the questioner shuffles the cards and the reader places theses into a set pattern which denotes, past, present & future events. The reader then uses the cards to interpret events for the questionier.
The future is not a set path and as most aspects in life are changeable then so is our future destiny. Our destiny is based on decisions we make daily and the Tarot can help to make these choices.