Traditionally, executives have used standard metrics, such as cash flow, inventory turns and operating income, to get a broad sense of the health of their firm. However, the game has changed with the rise of digital business models centered on the user. New metrics need to be devised based on the core user actions that drive value creation in such models.
https://knowledge.insead.edu/blog/insead-blog/digital-businesses-the-metrics-that-really-matter-6731/