you should see increases in your bTC ever 5-10 minutes.  Click the link to go to the ghash.io site (where your ghs is working) for a more realtime update.

What do you do with it?  You can let it sit, which will earn you bTC while your ghs' mine for you, or you can sell your ghs when the bid price is higher than what you paid for it.  2 ways to earn income on cex.io which makes it such a nice option.