The Golden Ratio Symbol is represented by the Greek letter Phi (Φ), which is a three-letter acronym. The Golden Ratio is a mathematical concept that has been used in art, architecture, and design for centuries. It is based on the ratio of two numbers, where the ratio of the larger number to the smaller number is equal to the ratio of the sum of the two numbers to the larger number. This ratio is believed to be aesthetically pleasing and is often used in art and design.