This engine has several novel features that are described in its Why use Google.com page. In particular, the engine often returns the most useful pages first; in fact, I have often found that the first listed page contains the information I need. Because it caches web pages, it is relatively fast at displaying requested items. It has a so-called GoogleScout (TM) feature, activated by clicking on the "similar pages" links, that provides additional relevant links with each item returned.
In addition, it has a specialized Linux Search Engine that I use as my primary Internet search tool. It searches the database of linux-related pages at Google.com further promoting search efficiency. Try it - I am confident you will bookmark it immediately.