The golden ratio, also known as the divine proportion or phi (φ), is a mathematical concept that describes a ratio found in nature, art, and architecture. The ratio is derived from the relationship between two quantities, such as the length and width of a rectangle, where the longer dimension is 1.618 times the length of the shorter dimension. The golden ratio is believed to produce aesthetically pleasing and harmonious compositions, and has been used by artists and designers throughout history. In design, the golden ratio can be used to determine the proportions and spacing of elements, such as typography, logos, and layouts, to create visually appealing and well-balanced designs. While the golden ratio is a subjective and debated topic in design, it remains a popular tool and source of inspiration.