 search is to start with our mission. Because it really does frame how we and our engineers think about these challenges. And our mission is and always has been to organize the world's information and make it universally accessible and useful. And as the internet changes and you think not just every year, but every day, our mission remains the same, but how we meet that mission continues to evolve. So I'm going to talk about three things in my brief time. I'm going to talk a little bit about how search works, because I think that's