Shared parameters are saved in a text file that can be placed in a shared area on the network to allow others to access it.
You can create shared parameters in the project environment or in the Family Editor.
Shared parameters are organized in groups that you create to assist with categorization. For example, you might create a group called electrical for specific electrical parameters or a hardware group for specific hardware parameters. You can create as many groups and parameters as desired.
Your session of Revit LT can reference only one shared parameter file at a time. If there are other shared parameters in a different file that you want in the active shared parameter file, you need to export the parameters to the active file.