What is an slot on a motherboard used for?

List of Motherboards with 2 Ports: Gigabyte B760M AORUS ELITE X AX, ASRock H610MAC, GIGABYTE B650M D3HP, ASUS Prime A620-PLUS WiFi, ASUS PRIME B760M-A,

SSD + 4GB starlite DDR3 RAM with Core 2 Duo CPU Combo set Motherboard ZEBRONICS ZEB-H81M2 with PCIE NVMe Slot Motherboard

m2 vs nvme slot An slot is a type of expansion slot found on modern motherboards that is primarily used for connecting solid-state drives

m2 expansion slot 2 Slot on Motherboard; Two types of SSD ; What are the An 2280 SATA SSD purchased separately: 2280 SATA SSD purchased