The Cortex-M0 is a low-power microcontroller core designed by ARM for embedded systems. It is part of the ARM Cortex family and is optimized for cost-sensitive applications, making it ideal for devices like sensors and small appliances. The architecture supports a simple instruction set, which helps in reducing power consumption while maintaining efficient performance. This core features a 32-bit architecture, allowing it to handle a wide range of tasks with ease. The Cortex-M0 also includes a range of built-in features, such as a nested vector interrupt controller (NVIC), which enhances its ability to manage multiple tasks efficiently.