Lawyers for Alphabet's Google and "Fortnite" maker Epic Games squared off before a U.S. appeals court in California on Monday, as Google tries to undo a jury verdict and a judge's order forcing it to revamp its app store.

Before we explore what the Play Store needs to copy from the App Store, let's discuss what it shouldn't. If there's one major way Google can differentiate its app store from Apple's, it's how you discover new apps and games. Right now, the Play Store is so difficult to use that it's easy to completely miss exciting new apps and games.

Google went to appeals court Monday in an attempt to convince a three-judge panel to overturn a jury's verdict declaring its app store for Android smartphones as an illegal monopoly and block the penalties imposed by a federal judge to stop the misbehavior.