Many shopping sites follow a similar retail calendar, focusing on big promotional pushes around the holidays. But when you're in the business of helping someone get ready to tie the knot, you can throw those traditional calendars right out the window.

Over the course of a startup's lifetime, a company can face a range of data challenges. In the beginning, startup founders do most analysis themselves using tools like Google Analytics. As a company grows, business and product leaders often have analytical questions that these tools—and busy executives—can't answer.