Before I get to the answer, a little background information is useful.
People arrive on your website through a variety of ways, and generally (not always but generally) the top 2 are:
Website Visitors from Organic Search Traffic
These are people who wound up on your website in response to a Google search. One of your webpages showed up prominently in their SERP and they selected it.
Website Visitors from Referral Traffic
These are people who arrived on your website from some other website, be it a social media site, or any other website.
It is in Fact All About Content
It’s very useful to think of online marketing as publishing.\
Websites that with more content tend to (not always but mostly) outrank websites with less content, and websites with fresh content tend to outrank websites with old content.
The best way to rank your website (and attract more visitors from organic search) is to publish a steady stream of quality content at regular and frequent intervals.
However, Websites that are Known More, Rank Higher
It’s an interesting dynamic that websites that more of us know about tend to (again, not always but mostly) rank higher in organic search.
This is because more of us link to the content on that website and more of us leave comments on the content on that website (each comment is an update to the website and sites that are updated more often tend to rank higher).
So You Promote Your Content
And this is where social media comes in.
While promoting your content via social media has not direct impact on your search ranking, it does bring in some traffic via social media, and the more people who see your stuff the more people there are to like your stuff enough to link to it and comment upon it, both of which DO have a direct positive impact on your SEO.
Learn More…SEO Needs Link Building