What are the top uses of PCIe x1 Slots?

You can place a PCIe 1x card into any available PCIe slot and it will work

It is a serial bus point-to-point protocol General processors use the smallest PCI x1 slots Graphic cards use the longest PCI x16 slots PCIe x1 interface has

pcie slot width ✓ Mini PCIe to 3 PCIe 1x adapter expands 3 PCI express 1x slot via your motherboard with mini PCIe can use 3pcs PCI express card (Sound Card , Network

pciex4 slot The PCIe x1 slot supports all types of wireless network cards, including the latest Wi-Fi 6 protocol However, a PCIe x1 slot can only support 1