Allow Multiple Conversions
Sometimes you may want to allow a visitor to see the campaign multiple times. Coupon code creatives is a perfect example of when this may be used.
The problem is, by default, we stop the creative from showing to visitors that have already "converted". To get around this go to the campaign you want to set this up for and select Settings to the right of the campaign name.
Next switch the button for Allow Multiple Conversions to Yes.