Microsoft recently decided to enhance its internal answering engine, which among other things provides meteorological and flight information, with the results of Wolfram|Alpha, offering users an enhanced user experience with “zero-click” answers to many questions posed by users in natural language.

Search engines keep a running keyword tally of which pages you have, who links to them, what they are about and how popular they are. If somewhere on some page in your site any two keywords exist then the crawlers have mapped it. If a link can be crawled and the page is still active, [...]