Are all campaigns are manually approved or only some ( for examples adult, one, which have trademarks in them etc ) ? Because I have started dating campaign - 1 day have passed ( working day ) and still no impressions\clicks.
They usually don't get past the approval unless the sees some kind of red flag that your ad violates the TOS, but you insist that it doesn't, then the ad gets through the approval time. Of course they may randomly review any of your ads even if they don't seem to violate the TOS. BTW, are you sure your selected keywords have enough searches?