We cannot see stars during the day because the Sun is too bright, but if we could we would notice the Sun slowly moving through the star patterns. It makes a trip right round the sky once a year, travelling through a band of constellations called the zodiac. The ancient Greeks divided the zodiac into 12 equal zones, called the 'signs' of the zodiac.
Each sign corresponds roughly to one of the zodiac constellations, through the official constellations that astronomers use are not all equal in size. People called astrologers make predictions about people's lives, based on the signs of the zodiac.