Why is QuickBooks Bank Reconciliation process important?

I don’t have enough accounting and bookkeeping knowledge, but I am using QuickBooks for my small business transactions. I don’t have an accounting and bookkeeping background, so I am not able to complete the reconciliation procedure. I know very well that I have to reconcile my business bank account on a monthly basis, but I am experiencing many QuickBooks Bank Reconciliation problems on a regular basis. So, it has become very difficult for me to solve this issue. Why is QuickBooks bank reconciliation procedure necessary? So please share some easy concepts here.