How to Search Google Without Advertisements
Some like ads with the text as many links are available which are related to the text searched.i.e for example you are searching for "Ajax" on Google, you are not so familiar with the topic and probably you don't know sites which provide data you need.So when you search for "Ajax" you get many related site links which are useful.Its really double advantage to have ads with the search so that you get required data and lots of data needed.
But some don't like ads at all and they want specific data needed and they exactly know what to search . For those people this trick would do good..
Google Search Without Ads : ( http://www.google.com/search?output=googleabout)

Google Search With Ads : ( http://www.google.com/search )
Note : I personally feel "With Ads" option is better because you get related ads , so its added advantage for your search - you get to know more sites i.e more the related sites , more is the amount of specific data you needed.