From last 3-4 years Google has been updating their algorithm regularly. Although, sometimes it might be painful for webmaster but on the contrary required too. As competition increases day by day the World Wide Web is becoming more crowded so, it is required to do changes so that user can get actual and authentic information through search engines.
Actually now search engines are working on the ideology of general user and continuously trying to offer the best search result to them. We have seen lots of changes in the interface of search result also. From the 1stweek of Nov 2013 I observed a change in “Ad” icon for inorganic results.
Yes, Google is now showing “Yellow Ad icon” adjacent to every inorganic listing on the page in spite of using just color as they were used to do earlier. I personally welcome this change and this will certainly help users as well as web marketers to identify the result quickly. Good work Google..!!