The discipline of making sure the information created at work is trustworthy, findable, usable, and kept or , across both digital and physical formats.
For most staff, IRM comes down to three habits: create good evidence, save it in the right place, and don't delete or alter it without authority. It applies equally to digital and physical material, and it treats information and records as strategic assets.
For non-specialists it is mostly creating reliable evidence of your work, saving it into the approved system, and not deleting or altering records without authority. Specialists add governance, appraisal, retention, and disposal on top.
IAR turns terms like this into working practice: assets classified against your disposal authority, stewarded by position, and ready to evidence.