google adwords experts in here please
i used to think adwords was a waste of money about a year ago when i tried it for 6 months or so
i just reignited some old campaigns and when i changed the time the ads can be viewed to only do 9-5 in the US, my ctr jumped up from around .5 to 4% (on a decent # of clicks/impressions)
so now im jazzed up about and want to learn more, how to get the negative keywords in, etc
any tips anyone wants to offer?
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