In my opinion the best way to track your hub traffic is through Google Analytics.
Google Analytics is free and easy to set up. If you don't have an account now, I would reccommend your sign up soon.
Google Analytics when added to HubPages will eventually tell you where your hubs are being viewed around the world, even down to particular ISP regions, these roughly equate to the largest towns.
You can also receive details as to where viewers came from in relation to websites. That will tell you where a link appeared.
If you don't want to use Google Analytics, there is a quick way to check on HubPages itslef.
Go to the Hub you want to know about.
Click on stats, just above your text.
This opens a basic statistics form, you can see which websites are sending traffic and a number of views for day, week, month and all time. This tab also, after several weeks offers possible keywords for a hub and also a word count and approximation of cash income from advertising.
More basic than Google Analytics but still useful in the short term.