Er. Well this is definitely the wrong forum - lol. I'd post this in the general discussion, or support forum?
You can delete this thread by posting the link on the clearing forum.
The stock exchange acts like a real life stock exchange - the shares shrink or grow in price, and you can buy shares in the hope that they will gain value and you can sell them for a profit.
The stocks change value twice a day, once at 12am and 12pm res time.
Hope that helps.