Baseline data points, also known as "baseline information" come in handy when you want to pass information from an external system to the care flow upon Start of the flow.
This way important information (e.g. surgery date, surgeon, consultation date, ...) from the external system can be used as input to configure logic. You won't need to create a form or calculation to use them in your care flow.
Create a baseline data point
Go to your Settings tab
Select General in the left-hand menu
Click on Create in the Baseline data points section at the bottom
Provide the Key and the Value type. Note: if you chose String, you have the option to define the input (Label & Value)
Under Optional you can define if the data point is mandatory at the Start of the flow or can be fed later