I have just been checking my Yahoo Mail, which kindly displays a skyscraper ad on the right side of the screen.
Marissa Mayer, Google's vice president for search products and user experience, has revealed an interesting experiment carried out by the search engine a few years ago.
The goal of the experiment was to determine the ideal number of results to display in response to a search query. Google surveyed its users, who decided 30 results on a page would be best, rather than 10 or 20.