Do I need to use AdWords Editor if I am running a single campaign. No, but it would be easier if you do. In fact, it is not mandatory, even if you have many ads everywhere on the Web. But, it is a very useful thing, so having it, will help you, that is for sure, so go ahead and download it. If you change your mind and start to run a lot of publicities, it will be there, you would save time.