They say you should always try and maximise your CTR on a new campaign. And to do this by starting with higher bids, using position preference, targeting a very small number countries and specify only daytime hours.
This is often termed the 'big' secret.
It sort of make sense, and I do use these ideas to get a better CTR and ROI, but I personally haven’t tried spending large amounts at the beginning of a campaign, as I cant afford it.
i don't adhere to it as a theory. the algorithm is fairly responsive to changes, meaning you don't get an extreme amount of credit for historical performance - so you spend yourself into a hole to get hogh positions, then lower them and you're back to where you should have started.
focus on quality and relevance. there are no secrets to beating the system.
I have words that perform better top left and others that perform better top right. These are only marginal increases but increases none the less.
Put another way, if I had to bet on one of the follwoing, I would bet on the second one without hesitation:
1) A haphazard and minimally targeted ad group with poorly written ads that link to a lame landing page - but with very high Max CPCs set for all the keywords.
2) A carefully targeted ad group with a crisp, informative, professional and well written ads (about exactly the same thing as the well-targeted and nicely grouped keywords) which links to an excellent landing page that provides a great user experience - but with moderate to low Max CPC set for all the keywords.
AWA