I use many different reports to track various KPI (key performance indicators).  The most important would be my receivables report.  This shows which clients have not paid their invoices yet.  I do not share this information with my clients since it is soley for the benefit of my business.

This report is then used to collect funds from clients who have not paid yet.  Other clients benefit from this because if invoices go unpaid for long enough, this would lead to higher prices overall.