The ancients recognised the four elements: Fire, Earth, Air, and Water as the main building blocks of everything in the Universe. These elements are at the heart and personality of everything. 

So its not surprising that each of the four suits in the Tarot are linked to one of these four elements. By understanding the nature of each element, we can add a layer of meaning to our tarot readings, that understanding helps us to interpret the cards, making it easier for our intuition to flow through our readings.