HOBY leadership program

I got a letter in the mail saying that I was selected to participate in the State Leadership seminar. I did not apply for it, however I know my school does it and someone from my school was selected. How did I get selected? Would I be representing my school? Do they do this or is this some sort of scam? Also if it is real, is it worth it? It doesn’t cost as much as other camps, but do colleges think this is something that stands out?