Short bob wigs are popular because they offer several benefits, including:

1. Low-maintenance: Short bob wigs are easy to style and maintain, requiring less time and effort compared to long hair.

2. Versatile: Bob wigs come in a variety of lengths and styles, from a classic chin-length bob to a choppy, textured bob, making them versatile for different face shapes and occasions.

3. Professional look: A short bob wig can give a clean, sophisticated look that is suitable for work or other professional settings.

4. Refresh one's appearance: Wearing a short bob wig can give a person a fresh, new look and change up their usual hairstyle.

5. Easy to manage: Short bob wigs are easier to manage, especially in hot weather or when engaging in physical activities, as they don't require as much upkeep as longer hair.

6. Trendy: Bob wigs are a classic hairstyle that never goes out of fashion and is always in style, making them a popular choice for people who want to stay on trend.

In conclusion, short bob wigs are a popular hair accessory due to their versatility, low-maintenance, and the professional look they provide.