What exactly is onsite event management staff for a concert?

I plan on attending Lady Gaga's concert and I can't decide what package to buy. One is offering onsite event management staff and I'm unsure as to what that is exactly. Depending what it is, it will determine that package I buy.What exactly is onsite event management staff for a concert?
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http://answers.yahoo.com/question/index?鈥?/a>What exactly is onsite event management staff for a concert?
Onsite Event Management staff means are the support staff for the corcert those who will be working for the production and activation of the concert.

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