Development boards are small, programmable circuit boards that help engineers and hobbyists create and test electronic projects. They often include a microcontroller, input/output pins, and various interfaces, making it easier to prototype and develop applications. Popular examples include the Arduino and Raspberry Pi. These boards are designed to simplify the process of learning about electronics and programming. They come with a variety of built-in features, such as sensors and connectivity options, allowing users to experiment with different projects, from simple LED displays to complex robotics.