First, girls like to wear jewelry just to look good. In order to look good, they should have jewelry to make them look more beautiful and better. It's an ornament for beauty. The reason why girls decorate themselves with gold and silver jewelry is to be more beautiful and have more temperament.
Second, girls like to wear jewelry to show their identity and status. With these, they show that their economic situation is better. Happiness is now a matter of status and economic status, so that they can show their status higher and the poor can't afford it.
Third, the jewelry worn by girls is more expensive and rich, which has certain collection value and appreciation space, so buying jewelry is both beautiful and appreciation space, killing two birds with one stone.
In short, why do girls wear jewelry is to be beautiful, to show their temperament, to show their beauty, to show their splendor, and to have room for collection and appreciation, so this is a kill two birds with one stone.