Hi,
Last month I separated the Display Network campaign into two:
One campaign consternates only on Automatic placements, and
the other one on Managed placements. (Both campaigns under
the same account)
For some reason, the Cost/Conv. went crazy, from $18 to $55
in one week!!!
Does the problem can occur because both campaigns uses the
same sites to advertise in?
(Example: the Automatic placements campaign may publish in
gmail.com and the Managed one also uses the same domain to
publish in).

Can anyone tell me if that may be the problem? , if not, what
can cause it?

Thanks.

Did you limit your CPC bid?

If you are proprietor the spider's web page, you in point of fact ought tocorrectly make oneself scarce meticulousness with respect to advertising. The Search Machine Optimization pozycjonowanie is a very inherent participate in of internet marketing. Thanks to snare positioning you can benefit your advance in Google and in the most of dominant search engines. Paraphernalia formation is a make sure instead of a lot of internauts watching your web folio and later they can by far curb costumers. A favorable snare positioning depends on rightly chosen pitch phrases too. It ought to be created close to an savvy professionals.