A star in heraldry is a symbol that looks like a little dot with lines coming out of it in different directions, like a little piece of a sun. It's often used in coats of arms and flags to represent important people or things. Stars can have different numbers of lines coming out of them, and these numbers can mean different things. For example, a star with five lines is called a pentagram and is said to represent the five senses or five fingers on a hand. A star with six lines is called a hexagram and is sometimes used to represent good luck or protection. Overall, stars in heraldry are just one of many symbols used to represent important ideas or things.