For this deal , Microsoft will gain access to Yahoo's audience would instantly more than triple Bing's U.S. market share to 28 percent. That's still a far from the remarkable 65 percent of U.S. searches handled by Google, according to the research firm comScore Inc.
This deal will make the cons to Yahoo as Yahoo will have limited access to the data on users' searches, which yield insights that can be used to pick out ads more likely to pique a person's interest. The value of that information is why Microsoft wants to process more search requests.
You can also view what will be about Yahoo Deal overview shown below.
I also found funny logo about this search deal as well.