Arduino is an open-source electronics platform based on easy-to-use hardware and software. It consists of a microcontroller board, development environment, and a large community of enthusiasts and developers. Arduino boards are equipped with input and output pins that allow users to connect sensors, actuators, and other electronic components, enabling them to create interactive projects and prototypes. With its simple programming language and versatile hardware, Arduino is widely used by hobbyists, students, and professionals for a variety of applications, including robotics, automation, home automation, and Internet of Things (IoT) projects.