Most ecommerce bugs are never reported. A customer hits a broken checkout on one browser, leaves, and you record it as a lost session rather than a fault. Those failures are invisible in analytics and expensive in aggregate.
We use Noibu to surface them and, more usefully, to rank them by what each one is costing. That turns a bug list into a priority order the business can agree with. We then fold the high-impact ones into the development cycle, so monitoring leads to fixes rather than a dashboard nobody opens.