Models are Fashions Secret Social Media Weapons

In your own words, summarize the central premise of this article.
What metrics are used to judge/measure the relative success of a fashion show? and why?
In your estimation, why are models with a large social-media presence one of the most effective methods for generating an impact from fashion shows?
From an overall business and marketing perspective, how do fashion shows actually work? That is, how does a fashion show impact the business results of a particular line of apparel?

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