Dynamic Random Access Memory (DRAM) is a type of computer memory that stores data in cells made of capacitors and transistors. Each cell holds a bit of information, but the charge in the capacitor leaks away over time, requiring constant refreshing to maintain the data. This makes DRAM volatile, meaning it loses its data when the power is turned off. DRAM is widely used in computers and other electronic devices due to its high density and cost-effectiveness. It provides the main memory for systems, allowing quick access to data that the processor needs to perform tasks efficiently.