It's imaginary money. And you've just volunteered as a donor! :)
You now have 35000 imaginary bits!
Check your profile page. In short, follow the 'donation settings' link, decide how much each of your shares donates, and how that is split between Hubski and the author of the content that you are sharing. For example:
This would mean that each time you share, you send 3 bits. 1.8 bits would go to Hubski, and 1.2 bits would go to the author.
bits donated per share (0 to 3500): 3
percent of donation given to Hubski (0 to 100): 60