Well it all comes down to Google and Bing. It was announced today that Yahoo! will start using Bing as its search engine. Yahoo! will continue to sell search ads that will appear on Yahoo! and Bing, but Microsoft will reap the rewards because the data on the computer user’s online search and buying habits will reside on Microsoft’s computers. It’s hard to say how this will affect PPC in the long run, but time will tell.

Here is a link to get all of the details.