First of all, I absolutely love* that there is a meta SE. This is great.
Anyway, I asked a question, and I got two notifications after an answer. One was just a green +10 next to my question, no info or other description in the notification, and the other was the same but +7. What did I get these points for? Are these reputation?
Yes, the green +X icons are notifications of your reputation change. Take a look at What is reputation? How do I earn (and lose) it?. If you see a +7, it's likely that you accepted an answer and got an upvote on your question. For a +10, that would likely result from a pair of upvotes on a question or a single upvote on an answer.
