Marissa Mayer is leaving Google for its major competitor.
One of the top players at the top search engine on the planet, Mayer was named chief executive of Yahoo today, instantly bumping her way up on the corporate America food chain and making her possibly the most prominent woman in Silicon Valley.
She had been listed as employee number-20 at Google.
An engineer by trade, Mayer was considered responsible for many of Google's best-known features, from its simple homepage design to Gmail to Google News and Images.
Her appointment as the President of Yahoo is considered a significant get for a company trying to compete with Google and Facebook. She begins her new gig tomorrow.
Referring to Yahoo as "one of the best brands on the Internet," Mayer showed appreciation for her time at Google but told The New York Times in an interview: "It was a reasonably easy decision."