A memory address is a unique identifier used by a computer's processor to access a specific location in its memory. Each address corresponds to a byte of data, allowing the system to read or write information efficiently. Memory addresses are essential for organizing and managing data in a computer's memory, enabling programs to function correctly. In modern computing, memory addresses are typically represented in hexadecimal format, which is more compact than binary. The processor uses these addresses to locate data stored in different types of memory, such as RAM or cache, ensuring that applications run smoothly and efficiently.