What’s the best way to measure product usage?

Fred Wilson (Co-Founder and Partner at Union Square Ventures)
Having Empathy For Your Users – AVC

I feel like the companies we meet with and work with generally do a good job of instrumenting their products and collecting on data on what is working and what is not working. But they often don’t have good answers for why the behavior they are seeing is happening. It’s hard to fix something you know is broken unless you understand why it is broken.