Well, if marketers are going to find value in AppWorld, they're going to need a proxy for engagement, a trail of breadcrumbs, some signal(s) that show were consumers are, what they are doing, and ideally, predicts what they might do next. And we as consumers also need this trail - we need smart navigation tools to figure out which apps to use, which apps our friends recommend, and how best to navigate the apps we are using. It was easy when there were just a few apps. Now there are hundreds of thousands. Soon there will be millions. Don't tell me a Google like metadata play isn't going to evolve inside such an ecosystem. After all, search did all those things for the web. But so far, we don't have a similar signal for AppWorld.