Your information asset register will help you determine what information you hold and who the custodian is. It should also contain other useful information such as the security classification of the data and whether any of the data has already been published on the Open Data Portal.
Making your information asset register available through the QGEA ICT profiling activity, or publishing the register on your website will help potential users identify which agency has the data they need and who they need to approach to request access.