thanks all for giving nice information.

If your products or services are good which you think are different than your competitors in terms of price or quality or feature then social media is a good source for traffic. If you are not providing anything unique then social media is not of much help.

Hello,
In off page SEO, bookmarking, directory, photo sharing etc matter a lot.

Some of the best sources to get a huge traffic are:
1. Search Engines and Search Engine Optimization
2. Article Marketing
3. PPC – Pay Per Click Advertising
4. Social Media Marketing
5. Email Marketing / Follow-up Lists

Social media is great. Also paid campaigns

Well there are many sources for traffic, the best source for traffic is social media marketing and social media optimization. The social media marketing is the paid advertising, from this we have to pay to run the ad campaign for your website.
From social media optimization we can share the post, any links for share, images, poster, infographics etc. We can also post contents relevant to our website and other information which we want to make viral.
Other best source for traffic are link baiting, forum marketing and posting answers on the website like Quora, Yahoo etc.