ARMv7 is a 32-bit architecture designed by ARM Holdings for use in a variety of devices, including smartphones, tablets, and embedded systems. It supports multiple instruction sets, including ARM and Thumb, allowing for efficient processing and reduced power consumption. This architecture is known for its energy efficiency and performance, making it popular in mobile computing. ARMv7 also includes features like hardware virtualization and improved security, which enhance its capabilities for modern applications and operating systems.