In, you can set different settings for QGIS Server :
Short name is a machine readable name for the layer.
dataUrl is the URL to a HTML or PDF presenting the data. It can be a link to the open data portal webpage.
If the link is empty indialog, the link in Lizmap will be automatically populated by the Lizmap plugin from set in this tab.
You can use the button in Lizmap to pick this value.