Arduino bootloader to work with Atmega 328p directly. For those who loves working with IC directly but also want to use arduino environment, this device is very very helpful for them. Simply use an old arduino board and place this shield over that. Burn bootloader first to the MCU. Then simply upload your skatch as you do with arduino.
You can also program your MCU keeping it onboard using 5 pin header cable. This will allow you to work more easily. No need to remove and place IC on zif socket again and again to load the program.
Hope you'll enjoy this device.