Keyboards and keypads are input devices used to input characters, numbers, and commands into a computer or other electronic device. The primary difference between the two is that keyboards typically have more keys and are used for typing longer messages, while keypads have fewer keys and are often used for entering numerical data.

There are several reasons why someone might want to buy a keyboard or keypad:

1. Increased productivity: Using a keyboard or keypad can often be faster than using a mouse or touchpad to input data. This can lead to increased productivity, especially for tasks that involve a lot of typing or data entry.

2. Ergonomics: Keyboards and keypads can be designed with ergonomics in mind, which can help reduce the risk of repetitive strain injuries like carpal tunnel syndrome.

3. Gaming: Many computer games are designed to be played with a keyboard, and some Gaming Keyboard even have special features like backlit keys, programmable macros, and mechanical switches that can enhance the gaming experience.

4. Specialized applications: Keyboards and keypads can be designed for specific applications like point-of-sale systems, medical equipment, or industrial machinery. These specialized input devices can often be more efficient and accurate than using a general-purpose keyboard or mouse.

5. Personal preference: Some people simply prefer using a keyboard or keypad over other input devices like a mouse or touchpad.

Overall, if you spend a lot of time typing or entering data into a computer or electronic device, a keyboard or keypad can be a valuable investment that can increase your productivity, reduce the risk of injury, and improve your overall computing experience.