The real reason Marissa Mayer left Google: She had to

In the end, Google simply didn’t have room for Marissa Mayer.
Yesterday, the ambitious executive shocked the tech world by leaving Google to become Yahoo’s new CEO, a role she officially takes over starting today.
As we published news of Mayer’s move, we were bombarded with criticisms of her decision. The Internet in general lambasted the executive’s choice, claiming that Yahoo was an inferior company and Mayer was making a fool’s bargain to choose Yahoo over Google.