The I'm Feeling Lucky button seen on google's home page is a feature that leads directly to the top-ranked page corresponding to your search keyword. You can avoid the search results page in cases you know the top-rated pages corresponding to your search. For example, you may need to go twitter's home, you only need to do is: type twitter in google's search box and then press the I' feeling lucky button. Then google will automatically redirect to www.twitter.com instead of showing the search results.