6502 Assembly Language is a low-level programming language used for the MOS Technology 6502 microprocessor, which was popular in the late 1970s and early 1980s. It allows programmers to write instructions that the processor can execute directly, providing fine control over hardware and memory. This language is known for its simplicity and efficiency, making it suitable for embedded systems and retro computing. It features a small set of instructions, which can manipulate data, control program flow, and interact with memory, making it a foundational language for many early home computers and gaming consoles.