"Zadig" is a philosophical novella by Voltaire, published in 1748. It tells the story of Zadig, a wise and modest young man in ancient Babylon who faces many misfortunes and challenges, including betrayal, injustice, and loss, but ultimately grows into a just ruler. The story explores themes of fate, justice, and human nature with humor and irony.

"This is Her!" is a perfume by the brand Zadig & Voltaire. It is described as a blossoming and sweet fragrance with a fresh scent of cool elegance, mixing floral, spicy, and oriental notes. The top notes include silk flower, rose pepper, and jasmine; the heart notes are vanilla, cream, and chestnut; and the base notes are sandalwood and cashmere. It embodies a rock, bohemian lifestyle and relaxed attitude.

So, "Zadig" refers to Voltaire's famous literary work, while "This is Her!" is a popular fragrance by the fashion brand Zadig & Voltaire.