Dude? Seriously? Go read some of the other posts to figure this out. But in a nutshell, just get your site linked in as many places as possible that's related to your site. Social networks help do that in many ways.
Social network help your site become popular by creating buzz about the company using social networks.
Social networks will make your sites or company show up in search engine results if you use it regularly. I belong to more than 10 and use all regularly and when you search my sites or my names, you will end up with returns from twitter, facebook, buzz, redditt, mixx, networkedblogs, and many more. The same goes for my name. It is like anything, the more you use it, the more it shows up.
I agree it's important to select your primary social avenues and set time each day aside to post to each of them with your information and other helpful information or tips to your readers.
Help you spread your links and if the links are good enough they can send you a decent amount of traffic
You can get good direct traffic for your website through Social Networking. Now it's plying major role in internet marketing strategies.
social networks can help you improve your serp ranks...like you are building strong foundations for your website. Just keep on leaving links to your website and the more you do it it piles up add value to your website
They help with dominating the the SERPS with your brand or whatever you are doing. The more exposure of your product the more people are aware of you and what you are trying to accomplish!
Besides the above, that is the best way to promote your website of service, sort of new word-of-mouth promotion.
Social media networking helps a great deal to increase traffic on your website. The frequency at which these social networking sites get crawled by the Search Engines is very high. These sites attract millions of visitors. Your website’s recognition in this site gains you top rankings in the SERPs (Search Engine Result Pages) and So Social networks are beneficial for SEO
And who told you this? I can look up my company name and my person name and my screen name and come up in these searches in almost every social media that I belong to.
there are lots of social networks that easily index on search engines especially when you are using good keywords for your site. You potential traffic came from social networks because lots of netizens sign up there.