The ARM Cortex-A15 is a high-performance processor architecture designed for mobile and embedded devices. It is part of the ARM family of processors and is known for its energy efficiency while delivering strong computing power. The Cortex-A15 supports advanced features like multi-core processing and out-of-order execution, making it suitable for demanding applications. This architecture is commonly used in smartphones, tablets, and other devices that require a balance between performance and battery life. The Cortex-A15 can run complex operating systems and applications, providing a smooth user experience in various computing environments.