Adding more RAM (random access memory) to a computer improves performance in several ways: - It allows applications to open faster by preventing the CPU from needing to constantly swap applications between RAM and the hard drive as RAM fills up. - With more RAM, the CPU can keep more applications stored in RAM, avoiding the need to constantly move applications back and forth from the hard drive. - More RAM also improves the ability to multitask and run multiple applications simultaneously without experiencing slowdowns.