DDR2 Memory is a type of computer memory that stands for Double Data Rate 2 Synchronous Dynamic Random Access Memory. It was introduced in 2004 as an improvement over its predecessor, DDR, offering faster data transfer rates and improved performance. DDR2 memory operates at a lower voltage, which helps reduce power consumption, making it more efficient for use in computers and other electronic devices. This memory type is commonly used in older computers and laptops, as it has been largely replaced by newer generations like DDR3 and DDR4. DDR2 memory modules come in various capacities and speeds, allowing users to upgrade their systems for better performance. However, compatibility with motherboards is essential, as DDR2 is not interchangeable with other DDR types.