Can someone explain MNSSHP to me like I'm a two year old?

[princesspumpkin]

I did a search, but couldn't find anything that really explained the workings of it. I just booked a trip for a friend, and now I need to tell her what to expect. If there is a link to a detail explanation, I would love for someone to post it. Thanks (and please forgive me if this is asked every other day)

 

[beattyfamily]

HERE's a link to MNSSHP info from this website with dates, times, this year's map etc....

And HERE's another website with some info.

Lastly, HERE's one more MNSSHP link to info.

Hope they hellp you.

 

[princesspumpkin]

Thank you berry much!