If you have a particular site you are competing with, or just want to find out the traffic of any website or blog, there are a number of online tools that can help.Most of them work quite differently from one another, in how they calculate the numbers, but solutions like Alexa, Quantcast, TrafficEstimate and even SEQquake provide valuable insights. Now you can add another neat tool to this list \u2014 one that goes by the name of SimilarWeb.In theory, it is impossible to know exactly how much traffic a website gets, as that information is private to the owners of that particular website.Tools that promises to provide these numbers does so based on their own research, algorithms and estimates. Some even include logs from Internet service providers in their statistics. Point being, you should always take this data with a grain of salt.They are guesstimates, at best.But still a good source to find out website traffic and demographic information. SimilarWeb works the same way, and one advantage it provides (against other such tools) is that a fair amount of data is available for free. Other provides charge monthly fees for access to their statistics.So simply input the URL of a website that you want to gather some insights on, and the tool will give you a brief report about that site, along with their traffic estimates.The numbers presented are quite close, though obviously not accurate.Obviously, the bigger a site, the more precise an estimate it will provide. For example, TechCrunch lists on their \u2018Advertise with Us\u2019 page that they receive 34 million monthly page views. And sure enough, SimilarWeb provides numbers in this range.However a lot of smaller sites are not enumerated, understandably.As it stands, though, this probably is one of the better traffic estimation tool available online, and you can use it to gather some good results and compare how your sites compare with your competitors.It also works with mobile apps, so give it a try at this link.