What does 4 gb ddr3 sdram mean?

4 GB DDR3 SDRAM refers to a type of computer memory with a capacity of 4 gigabytes, utilizing the DDR3 (Double Data Rate 3) technology. DDR3 is a generation of synchronous dynamic random-access memory (SDRAM) that offers faster data transfer rates and improved energy efficiency compared to its predecessor, DDR2. This memory type is commonly used in computers and laptops to enhance performance and multitasking capabilities.