I have tried to be a leader. I have tried in my role of being one of the first women at Google, let alone the first woman to have a baby, to really try to set the tone that this is a great place to work for diversity reasons.

Rarely are opportunities presented to you in a perfect way. In a nice little box with a yellow bow on top. 'Here, open it, it's perfect. You'll love it.' Opportunities -- the good ones -- are messy, confusing and hard to recognize. They're risky. They challenge you.

We are a consumer company and our success is directly linked to our users trusting us. Therefore we have the same incentive as the user: they want to see relevant advertising so their experience of Google is positive and we want to deliver it.

I'm excited about the opportunities with mobile phones and being able to receive information on the go and relevant to what I'm doing at that moment in time.

The main motivations were to try to leverage Google's expertise with large computer systems and to try to give something back to science

I have tried to be a leader. I have tried in my role of being one of the first women at Google, let alone the first woman to have a baby, to really try to set the tone that this is a great place to work for diversity reasons.

I love taking an idea... to a prototype and then to a product that millions of people use.