10ml is the size of the bottle. They come in various sizes like 10ml, 15ml, 20ml, 30ml, etc. 8mg is the nicotine dosage. That varies too...0 nic, 8mg, 11mg, 14mg, etc....all the way up to 36mg.
It really is a learning curve paladinx so if you are really dead set on trying to cut down or quit smoking, you have to give it time to find what works for you. Just like me...I started with 11mg, then went to 18, then to 24 and none of it was satisfying. But I was pretty committed to trying to make this work so I tried the 36mg and right now, that is working for me (but I know that's not for most people...too high....overdose possibilities). But the point is, if you really want to do this, you will have to stick with it and experiment some more.
On the other hand, just like anything else, ecigs aren't for everyone. And that's for you to decide.
Best wishes!
Lu