Investigations provide a Notes field, which can be filled out by users to annotate the investigation.
In Patients - Medical Records - Documents, the Description column displays the Notes field of investigations. If there are no Notes, users need to click on investigations in order to determine what they are for.

To make it easier for users to determine what an investigation is for, include the name of the product used to generate it, where there are no Notes.
If multiple products were used to generate the investigation, select the one with the lowest identifier.
Note that this is a display-only change; the investigation is not modified.