Marissa Mayer on the future of Google

"We think it's really important to move beyond just keywords and allow people to ask questions, and maybe access things more easily from their mobile phone," she says. "We're also looking at how to weave new media into it and how we can bring books, videos and news right into the search experience. And then there are various pieces of personalisation."

To celebrate Google's 10th birthday Mayer laid down her thoughts on the future of search in a recent blog post. She believes that, while search is 90 per cent solved, the last 10 per cent will take decades to complete.