Shoe fit refers to how well a shoe conforms to the shape and size of a person's foot. Proper fit is essential for comfort, support, and overall foot health. Shoes that are too tight can cause blisters and pain, while those that are too loose may lead to instability and injuries. To determine the right shoe fit, individuals should consider factors such as foot length, width, and arch type. It's recommended to try on shoes at the end of the day when feet are slightly swollen, and to walk around to ensure they feel comfortable and secure.