Sometimes we get expenses and the payment of that expenses can be done in 30 days or 60 days. So, we instroduce the invoice, but that vendor expenses is not yet paid.
Some times you can make payments on a fixed day of the month so you make payment from the bank to all that expenses (vendors) that have to be paid. So it's good option keep a status of that expenses what need to be paid and when is the limit.
In other hand… we must track taxes from expenses, it's a little more complex. Didn't see anything to track expenses taxes.