As I'm sure you've heard, antitrust regulators in the European Union today fined Google $5 billion for abusing its power in the smartphone market. And they are requiring the search giant to make behavioral changes to prevent future abuse.
Looking over the complaint, I feel that the EU has adequately explained how Google has abused its market power, which derives from a monopoly in Internet search. It also addresses why Google did what it did: To ensure that its search monopoly would continue as the world transitioned from PCs to mobile. And Google, not coincidentally, now owns a near-monopoly in mobile devices too.