how SEO(search engine optimisation) & SMM(social media marketing) useful?

[Albert Einstin]

SEO is on-page optimization using some meta keywords they identify the which keyword is in good place, through SEO you can also identify who are visited your site and how long they spent on site, it is through Google analytic s.
SMM is off-page optimization here the main focus on the promoting site through different channels like face book, twitter, linked-in, etc, posting directories, bookmarks etc.
the SMM activities helps more in promoting for your site, it creates back links to you, provides good page rank to your site.

http://www.nichepro.com

[Kristie]

I suggest that you both use SEO and PPC scheme to effectively advertise your product. And a software that can take care of your ppc tracking can be a lot of help too! Check them out here: http://ppc-conversion-tracking.com

[tibors]

SEO provides the most targeted type of traffic you can get. If you are selling something online and visitor came to your site from search engine because they were searching for your product's name for example they are most likely to it through you.

[grrrzippy]

It should reduce your promotional costs, but if you do it yourself it will take a lot of time that may be better spent concentrating on your business. I would recommend that you use these methods as well as paid advertising such as google adwords.