Expansion options in a computer are basically what make it possible to upgrade or customize your system without starting from scratch. Things like PCIe slots let you add a graphics card, sound card, or Wi-Fi adapter, while extra RAM slots and storage bays give you space to boost performance or add more files. The big benefit here is flexibility. You can improve your computer based on what you actually need, whether that’s faster speeds for gaming, more storage for photos and videos, or just better overall performance. Instead of buying a whole new computer every time you need a change, you can just upgrade the parts that matter. It’s a smart way to keep your system up to date and get the most out of your investment.