When you ask a question you have the beginnings of a query. Although some search engines such as Ask Jeeves, encourage you to use a natural language question format, all search engines ignore the question mark and focus on the key terms in your request. If you ask, 'How do you track satellites?' A search engine will focus on the words track and satellites, filtering out 'how do you?' as irrelevant to the search. (See the IMSA Micro Module: Using Keywords Effectively for more on why search engines use 'Stop Words').