What is the purpose of expansion slots? What's an example

What is the purpose of expansion slots? What's an example expansion slot function No sir, thise expansion slots are open spaces at the back for pcie components Only space for one inch drive Im sure you could find a spot expansion slot To begin with, let's get some information about the expansion slots definition Expansion slots are also called bus slots or expansion ports,

expansion slot drawing Expansion slots have what's called data lanes, which are signaling pairs that are used for sending and receiving data Each pair has two wires,