Does anyone know whether there is some advantage to doing a separate campaign instead of a separate adgroup, or vice versa? It seems to me just from observation that Google places a new campaign more than a new adgroup (but it could have just been those particular topics)and I am looking for robust placement as I try to convert tens of thousands of customers per month from AdWords. I know there are probably a lot of variables but if anyone has insight I would appreciate it. An example would be if I were advertising on two different currencies (for investment) to convert people to the same product. Also to consider, the campaign I am thinking of adding an ad group to is one of my top performers and Google puts it all over the place. I don't know if that would have an effect, making it more advantageous to do an ad group in a well-performing campaign than to do a new campaign.