There are a whole lot of PPC management companies in the market, with each claiming to be better than the rest. So, how does an advertiser decide whom to choose? Here are some tips:Make sure that the PPC management company you select is not working for your competitors. If it does, then start rehearsing the famous Shakespeare dialogue "Et tu, Brutus!" Not only should your PPC management vendor not deal with your competitors, you should get a guarantee from them that they will not even talk to your competitors when your PPC campaign is being planned and executed.Make sure your vendor does not resort to unfair means in getting you a higher rank. There is a method that below-average PPC companies employ - called "cloaking" - that may get you penalized by the publisher. Some PPC management fi...