SMO stands for social media optimization and SEO stands for search engine optimization. SMO is a little bit hard to SEO. So use SEO techniques to promote your website.

SEO is search engine optimization as the name suggests it is a technique used to promote your website on the internet and increase your websites ranking in google search. And SMO is social media optimization. It is also used for the promotion purpose, but it includes various social networking sites.

both are best on there place..