This is a development programmer board for ATtiny13A, ATtiny25, ATtiny45, or even the ATtiny85. It has a micro USB connector, a socket to install your ATtiny IC, 8 male headers and holes to connect the pins of the ATtiny IC to the parts of your project. This development board is mainly used when you want to do simple projects like reading a single sensor or blinking LEDs. With it you can make your project work with a smaller size and a cheaper price than the Arduino.
Please note that this module DOES NOT come with the ATtiny IC.