Tarun jaitely

Don't agree with you brother. Search traffic is the best source each and every niche.

I don't agree that organic visitors bounce away, it will only gonna happen when you don't have content which they were looking for. I have an automobile blog where organic visitors spend hours in comparing and reading specs of various cars.

You can't compare organic traffic with social traffic. Do a case study, build a site by following seo rules and build social presence for another site. You will see the difference by yourself. If you want to grow your blog/site seo is must...

SEO is the main source of traffic. You can't depend on Social media only.

Yeah but SEO if done appropriately can give you better results than social media..