MORE GOOGLE ANNOUNCEMENTS:

In addition, he wrote, the company's Voice Search technology will "soon" be available for iOS devices -- a move that could directly undermine rival 's competing Siri product.

The Knowledge Graph is Google's vast real-world database, which is used to provide contextual search suggestions for common terms.

"Starting today, you'll see Knowledge Graph results across every English-speaking country in the world. If you're in Australia and search for [chiefs], you'll get the rugby team -- its players, results and history," Singhal said.

Along with the integration of Gmail results into some searches, Singhal said Google is working on a feature that pulls information from air travel confirmation emails, for quick reference.