Many times our clients credit scores drop due to new accounts being added, credit card balances or losing a older line of credit and we get asked "why my scores dropped!?". It takes several minutes going back to their reports (days or weeks later) and comparing them side by side to find changes.
Credit Karma and many other credit monitoring apps have a section that identify the list of changes, explaining the reason or scenario for the drop and this would help CRO's a ton!