There’s one big theme in tracking and analytics: it is tough to maintain a high-quality data system.
You have to make sure that you can track the service and financial KPIs of your business on a regular basis. Your service KPIs should be at hand at real-time:
• to make your product better, you have to measure user actions (not page views)
• to increase conversions, you have to identify where you lose customers in any process, and run experiments to fix issues that you discover.
• to improve retention, you have to visualize how often your customers return and engage with your service.
On top, you have to be able to very timely trace your financial KPIs such as revenues and cash flow.