What Is an Slot and What Devices Use the Slot?

So I have a bit of confusion here on which Slot do I use Motherboard manual says following -For 3rd gen AMD Ryzen Processors, the _1 supports PCIe

PC Components · Form Factor: 2280 · Interface: PCI-Express x4, NVMe · Total Capacity: 2000GB* · Sequential Read Speed : up to 2400 MBs** · Sequential

pcie slot configuration gen1 gen2 gen3 Buying a compatible SSD for your PC can get confusing Here's how to make sure your SSD is compatible with your motherboard

pc pcie slot 13:49 · Go to channel · A Beginners Guide: Upgrade Your PC Storage