Think back to a time when you desperately needed to know something — George Clooney’s net worth, for example, or how to make pesto. Wasn’t it just this morning that you wanted to compare safety ratings for SUVs or check the current exchange rate for Canadian dollars? The point is, when you need to know something, chances are you do what everybody does: You type a word or phrase — “pesto recipe,” for example — into a search engine like Google or Bing.