DDR2 RAM is a type of computer memory that stands for Double Data Rate 2 Synchronous Dynamic Random Access Memory. It was introduced in the early 2000s as an improvement over its predecessor, DDR RAM. DDR2 RAM allows for faster data transfer rates and improved performance, making it suitable for various computing tasks. This memory type operates at a lower voltage than DDR RAM, which helps reduce power consumption. DDR2 RAM is commonly used in older computers and laptops, but it has largely been replaced by newer generations like DDR3 RAM and DDR4 RAM, which offer even better speed and efficiency.