An Arduino board facilitates electronic projects by providing an easy-to-use platform for developing interactive applications. It consists of a microcontroller that can be programmed to control various electronic components like sensors, motors, and lights. The open-source environment of Arduino allows users to write and upload code to the board, making prototyping accessible to hobbyists, students, and professionals alike. Additionally, the extensive library of pre-built functions simplifies tasks, enabling users to focus on creativity and innovation in their electronics projects, from simple circuits to complex systems.