The Quantcast tool is still relatively new – at least in comparison to SimilarWeb and SEMRush. Regardless, it offers high quality, relatively accurate traffic analyses. Although figures may not be exact, they are still absolutely on the right track. There are also advantages to having detailed information about the target group. An example of Quantcasts abilities:
Google Analytics is an invaluable source of data on just about every conceivable aspect of your site, from your most popular pages to visitor demographics. Keep a close eye on your Analytics data, and use this information to inform your promotional and content strategies. Pay attention to what posts and pages are proving the most popular. Inspect visitor data to see how, where and when your site traffic is coming from.
I really agree with you on these methods to drive traffic without search engines. But one thing I had to mention that this kind of traffic will not be as targeted as organic traffic is. Thus,the conversion rate will be lower. Anyways great post. These methods are very helpful for new bloggers as driving organic traffic will be very difficult for them.
Websites produce traffic rankings and statistics based on those people who access the sites while using their toolbars and other means of online measurements. The difficulty with this is that it does not look at the complete traffic picture for a site. Large sites usually hire the services of companies such as the Nielsen NetRatings or Quantcast, but their reports are available only by subscription.