Not long ago Google changed the colour of their ads from yellow to green, you may remember the "Ads" symbol on the first couple of lines of results indicating an advertisement; yes that is what has been changed. You might ask "this is not a major change, why is it important?"
Now the ads are very similar to the organic search results, this means number of clicks on the ads can potentially increase. This comes a month after Google started to show more ads on top and bottom of the first search result page. One might say, Google is looking to make more money and help more business to be found through ads. Yet comparing to other search engines such as Yahoo and Bing, Google's green ads are easier to spot.
Google launched green ads first in USA and then in Europe, interestingly enough the results are showing some slight change in the click through rates (CTR) on the new design, maybe a good news to advertisers to get more traffic for their money after all.