To get good increasing on site and get good result and traffic on site in seo the following techniques are be used.
1.Social Book marking
2.Directory Submission
3.Forum Posting
4.Blog Comment
5.Article Submission

SEO is the search engine Optimization where the site up gradation work done & it helps to site for getting rank in search engine when SEM is done on Socail Media Marketing. It done on Social sites.

There are two types of seo On page SEO and OFF Page SEO. Both are doing for site up gradation but in On Page the work done in the site and in Off Page SEO the work done on other site.