Fixed to the desk mounting clamp is a 3-section telescopic pole ... extra is a 5/8” spigot for mounting a studio flash head ...
A clamp mount is the most common for home office ... though some might come through if the arm is mounted to a thin, light desk. Make sure to mount the monitor arm to a secure surface and adjust ...
The Tarion Desk Mount Camera Stand is a different kind of table-clamping support that lets you really play all the angles.