What does it mean for a monitor to have a DisplayPort out connector?

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Keep the PCI-E slot stronger and safer EZ Debug Led Onboard LEDs will HARDWARE MONITOR Get immediate access to your critical hardware information

Buy MSI inch Full HD IPS Panel Eye-Friendly Screen, Built-in Speakers, Accessory Slot, HDMI, DP Office Monitor for online  Connectivity Options 1 Security-lock slot 2 Power connector 3 HDMI port 4 Stand lock 5 DisplayPort 6 DisplayPort 7 USB Type-C

slot online usa M27UA Gaming Monitor · Explore · AORUS Unlock the latch of the PCIe slot easily when remove the graphics card in the PCIe slot  Multi-Monitor Arrays IPS-level Nano-Edge Display IMMERSIVE ADAPTIVE SYNC *Additional SSD slot only available on GTX1660Ti and above models