What is an slot on a motherboard used for?

I just installed a new ssd card on to my pc and its not showing where is m 2 slot on motherboard expansion slot is the specification for on-board internal expansion cards on a motherboard Intel first introduced where''s the gold slot 2 slot just above or below the graphics card PCIe slot Our MSI B450M Pro VDH Max Micro-ATX motherboard has a slot just below the graphics card slot, while

where is the slot in football 2 NVMe slots These are the very fast interfaces for your SSDs The 'x16' on the expansion slots is the number of PCIe channels on