NVME M2 drives: which slot to use?

When looking at different types of SSDs, you may have come across terms like NVMe, PCIe, and Fundamentally, the distinctions among

Two types of SSD Note: SSDs using the PCIe x4 bus use M-keys since it is the only one that supports PCIe x4 lanes

m2 vs nvme slot CONSISTENT M2 SSD is a fashioned like a stick of gum form factor for SSDs These SSDs are often faster than standard SSDs,

m2 sata slot I want to add SSD drive in my notebook I find M2 slot marked as M2X3 What type M2 SSD can I use?