If you have a business, then you need to track company finances.  The two main reasons are:  to keep your business running smoothly and to generate reports required by the IRS, SEC, and anyone else that you may have to answer to.

QuickBooks helps you perform basic financial tasks, track your financial situation, and manage your business better.

QuickBooks works best for smaller and mid-sized companies and non-profit organizations.  There are many different versions to meet business needs.  It is not hard to use, BUT you should know accounting rules.  It is hard to find a problem if you are not sure what rules apply and why QuickBooks puts items in different places.  

I have added a link to give you more info on why you should use it.

http://cazley.com/10-reasons-why-you-should-use-quickbooks/