According to Alexa, most of the traffic is coming from the United States, United Kingdom, Germany, Japan, and India. Cross-referencing other web traffic statistics, it's also a fact now that Coinmarketcap has overtaken most of the major relevant websites including Wall Street Journal, Investopedia, Bloomberg, Seeking Alpha, and Money CNN. Except Yahoo Finance, by roughly 200 ranks.
While it's difficult to ascertain what visitors are really doing on Coinmarketcap, I will give my opinions on the matter since I'm a frequent user of that website.
It looks like half of the visitors usually go there only to view the top 100 coins. With an average of 3-4 pageviews and 7 minutes spent on the website daily, it is most likely that most traders, investors, and speculators are using Coinmarketcap for the following:-
Check out new coins. There are over 800 crypto-assets now so it might take some time to even skimp through. The website is pretty useful for casual due diligence on projects with most relevant links in one place, other than charts and indication of network value (I prefer this term over market capitalisation recently). Above that, they also have the Markets tab for anyone to check up on exchanges that are trading the specific coin. The Social tab is alright as well, as it is a quick overview on the related social media accounts like in Twitter and Reddit, if any. Check out Steem's Coinmarketcap page here: https://coinmarketcap.com/currencies/steem/
Keep up to date with projects intermittently, especially if one is participating in many of them without close involvement.
Determine long and short positions using the Trending Gainers & Losers page here: https://coinmarketcap.com/gainers-losers/
So if you're part of any cryptocurrency related projects, it would certainly help a lot to make the relevant pages filled with the best information at all times. There are just too many eyeballs and potential that would otherwise go to waste, assuming there's substance deserving of attention in any of the projects or coins listed. Something for consideration: a Steem plugin or widget could do wonders on that website. It could be for the comments section like Disqus since it seems that it could be a hotbed for crypto rants, rumours, and discussions. Also, Steemit could be one of the components in the Social tab for any of the coins. Just saying that it's probably worth the trouble to take over one of the most visited crypto / finance websites on the planet.
If you're wondering what's with my slightly out-of-character and over-the-top post title, it's because of this hypnotic video hyping up Lisk last week. Maybe an extremely terrible idea, but it's funny that I took it as a signal to scoop up more of those "way undervalued" tokens. I hope the Youtuber makes another one specifically for Steem as well..