1 To look taller
Many short women love wearing heels to look taller. Being tall can be considered by some people a sign of beauty. For example, most models are tall, as clothes look better on tall models. Thus, being tall can give a sense of satisfaction.
2 To look more attractive
Studies have shown that both men and women find women who wear heels more attractive than those wearing flats. Heels change the body’s posture into a “Lordosis” posture, where the hip lifts and the back arches. So while walking, she will look more feminine as she will display more hip movement. (See What makes a person attractive?)
3 To boost her confidence
Height is thought to be associated with power. Long ago, men wore heels first, and then women started wearing them afterwards to show masculine power. Heels make women look determinant and self-dominant. They help her keep a straight back and shoulders, thus, feeling more confident.
4 To look leaner
High heels make the legs look longer and slimmer. They strengthen the muscles and tone the calves, giving the leg a sexy shape. They help women to look leaner and thinner.
5 High heels are considered a fashion icon
Women love fashion and elegance. Heels have always been a fashion trend that doesn't fade away. There are different types of heels varying from stilettos, pumps, to the more comfortable ones like wedges, and they can suit almost any outfit, making it look more elegant.
6 Women get a dopamine rush when they buy heels
Studies show that a large amount of dopamine is released into the brain when shopping (especially shoe shopping). Dopamine is the chemical that mediates pleasure in the brain. So a dopamine rush can be the reason behind women’s shopping obsession since it has addictive properties.
7 To look more professional
Heels are known to make women look more professional and that's why they are sometimes worn in business environments. Some women wear high heels to be taken more seriously.
8 To get more attention
In addition to making them look more attractive, high heels usually draw more attention to women because of the sound they make and the additional height they give to women. (See What makes a woman physically attractive to a man?)