Google, and other search engines, use a mathematical algorithm(PageRank) to calculate how relevant your Web page is to the content it is presenting. You do not have to know how, exactly, PageRank is calculated, just how to work with it.
If you have ever reviewed a list of the top most commonly stolen items, laptops and cellphones are allways in the top ten. These high-target items usually have personal, business and sometimes sensitive data you wouldn't want falling into the hands of a stranger. So, what do you do if your laptop is stolen? Well, that depends.