Venus, in ancient Roman mythology, symbolised the Goddess of Love, who was renowned to be the most beautiful woman in the world. Both mortals and Gods were attracted to Venus' famous beauty and her love of life. The Goddess Venus was synonymous with beauty and the sensual pleasures of life - food, love, sex, music and the arts.
The ancient Romans named the planets in honour of their Gods and Goddess and so the planet Venus was named in honour of the ancient Goddess because it was the brightest planet visible in the night sky - a shining light, much as the Goddess Venus was thought of too.
Where Venus is placed in a person's chart shows how the person behaves in intimate relationships. Venus represents a person's love style, how they love others and their core moral values.
Basically the planet Venus represents: