What makes a Campaign Ad effective?

After looking at the 4 main components of ads which are emotion, persuasion, truth, and style, its become evident how these lead a campaign ad to be effective.  In most cases a good ad will have a mixture of all elements, but this is not necessary in all cases.  For example, "Peace Little Girl" was very effective because of the strong emotion tied into it along with how attention grabbing it was.  This ad had only a hint towards factual information giving it almost no aspect of "truth", as is seen in the rubric for advertisements.  While it doesn't hit each of the 4 categories, its still very effective because the extreme emotion within it is going to be drilled into peoples minds and the message will be stuck with them.  Another ad that was very effective, yet didn't fill each category was "laughter."  It had no truth behind it or factual information.  But what it lacks in facts, it makes up for with its strong message and enjoyable style.  Its an ad that most people probably took liking towards at the time it was aired because of its uniqueness.  While it was stuck in peoples minds, it brought along the idea that the attacked person in the ad was very much a joke.  One of the most effective ads I came across was the "windsurfing" ad against John Kerry.  It has a very clear emotion and central issue.  Its also very convincing because it holds multiple facts of truth, and is enjoyable to watch.  This issue clearly hits on all 4 components of an ad and is still very effective like the other ads mentioned although they didn't hit all 4 parts.  Overall, a campaign ad is most effective when the components it's focused on are very clear.