Yes! You just enter your comic, optionally add a banner, and you will get a link to a page from which people can vote for your comic. If you check the other comics, you'll see. The more people vote for you, the higher you get in the ranking. And you are allowed to vote for yourself, too! Comics in the front page get more traffic, of course. You can also advertise with them, I did it a couple of times and was quite happy with the results. It's just a site that I like for promotion.