Difference between SEO and SMO ?

[maryp]

SMO is based on social media sites while SEO is based on search engines.

Both are marketing methods today, however SMO is helpful in SEO as it sends social signals to Google search engine, based on this your site will get high rank in Google SERP.

[ksparks30]

The main difference between SMO and SEO is that
SEO stands for Search engine Optimization
SMO stands for SOcial Media Optimization
SEO includes Off page and On page activities of website.
SEO is the highly effective.

[ericvhayes206]

SEO is the process of gaining traffic to improve web page exposure.  It is done by doing a certain link building strategies while SMO is through social networking sites.

[emilio]

Hi,
SEO
- low cost
- good in the long term
- highly competitive
- provides backlinks
- help to get top rank in SERP

SMO
- low cost
- highly competitive
- no backlinks(generally)
- organic traffic
- generate business through leads.

I would add to these great  outlines the fact that Google, in his Guide for the Webmasters insists that links from the AdWords "are safe" and could not a penalty by using this appraoch of marketing, beeing nofollow! :-)
in some situations, SMO isn't such as low cost at all, must bid higher to see some results.

[parijatziw]

 Social media includes activities such as blogging, book marking, tagging, RSS feeds and Video and Photo sharing. It is basically a viral marketing technique used on social networking websites. The biggest advantage of SMO (Social Media Optimization) is you can expect traffic quickly in comparison to SEO. This refers to all the methods that can be used to create publicity and attract traffic to your website using the social media. The social media include Facebook, twitter and MySpace and many more.

The traffic you receive from your SEO efforts is huge and consistent. You continue to receive the traffic based on your SERP (search engine rank positions). If you have higher ranks, you have huge traffic. SEO activities are on-page submission and off page submission. The main purpose of the increase the exposure of specific keywords to increase website visibility.