Q Should I get a motherboard with two PCIe x16 slots or more x1

What is the purpose of having more than 1 PCIe x16 slots? slot pcie x16 List of Motherboards with 4 PCI-Express x16 Slots: ASUS Pro WS TRX50-SAGE WIFI, GIGABYTE A620M C, GIGABYTE B650M C V2, ASUS Prime B760M-A AX, GIGABYTE B760M slot machines in vegas airport Pci Upgrade your PC with our PCIe 16x GPU slot, featuring a robust 164-pin straddle mount design and slide lock mechanism for secure,

slot winstar x8, x16 PCIe Gen 3 bandwidth, 1 GBs, 2 GBs, 4 GBs, 8 GBs, 16 GBs PCIe Gen 4 Does PCIe Gen 4 make PCIe NVMe SSDs faster? PCIe Gen 3 was unable to