Which Social Media site brings the best traffic？

From my previous experience I have seen that Facebook brings the high quality traffic which has good conversion. Rest of the social sites only bring traffic to visit the site. No conversions from there. Thats from my practical experience.  

I have been doing Search Engine optimization for my personal websites for some time and I feel Social media is key to bring in a lot of traffic.It all depends on the content. The strategy for each social media is different. For example1. In Facebook: we need to make people follow us before we write any good content. Understand who is your target audience. Attract them with unique image / video content. These days image / video is more dominant in FB.2. In Twitter enthusiast, people follow you back if you follow them. Moreover there is more chance of getting Retweeted if you are in touch with key people who are experts in your target domain. Keep interacting with them and engage them3. In Reddit, you have subreddit for each topics. This has the most chance to get hits if your content is really good. If you are able to write a content which can stay at the top of a subreddit for a day you can get a minimum of 1000 hits. (Depends on the popularity of subreddit).There are other platforms like Pintrest, Stumble Upon which are little different to the existing ones. But generally the strategy remains the same.  

If i'm talking about genuine traffic and conversion, LinkedIn is the best. There may be less impressions compare to Facebook but quality of conversion is great.