It is said that there is no point in reinventing the wheels rather realigning them. This means you don't have to work hard to come up with new things rather look for what works and model it to your own advantage.

This is the reason why I keep in searching about the competitors in my niche in order to discover some of their traffic sources. I have been checking the big players in my niche to see where they are getting the traffic from.

I have been trying for several times but I am yet to see way out. I want to ask you guys that what are the ways to know the source of traffic for a website?