There's not much that you can say about Google--the search site is that efficient. You only have this very big search bar at its center and a few options above that will help you make your search more thoroughly.
The design is brilliant in its simplicity, since it will hardly have the user confused on what he/she has to do by not throwing and overabundance of information. The user doesn't feel drowned with information, he/she simply looks at it and knows exactly if not almost instantly what to do with it.
Once you have your subject, all you have to do is type it to begin your search. The search results are extremely organized and easy to handle. It just makes sense.