https://www.theatlantic.com/politics/archive/2016/07/a-laymans-guide-to-the-republican-and-democratic-national-conventions/489560/

“The goal is to keep all those squabbles about the platform and rules—the nuts and bolts of a political party—in the background, and the spotlight on themselves. Conventions in the modern era are less about the parties than the candidates, and this is their showcase… these eight days in July may be their last, best chance to get millions of anxious, dissatisfied Americans to embrace them, and their visions for the future.”