let me tell in a simple way...on page is to optimize your site as per Google guideline and off page generating backlink or making you site popular..

Look for Website Marketing is a self-discipline of agreements that would make possible for you to have positively the popular place for your website searching engine search engine webpages. SEO has two kinds; on web page and off web page SEO. We will deal with the latter one i.e. off web page SEO.

I will recommend you to do Guest Blogging and PR Blog Comments.

seo provide two good strategies.
1.off-page seo:-
1. Directory Submission
2. Social Bookmarking
3. Classified
4. Article Posting
2.on page seo:-refers to modifications that can be made to the pages of a website in order to improve its performance. One of the most popular on-page techniques uses keywords, those terms that Web surfers will use when trying to get a hold of your site through a search engine. Professionals advise that, for optimal utility, these words should be placed in the "title" and "meta" tags, in the name of your site's domain, as well as throughout the content of the pages.

Off page SEO means optimize your website, through link submit of your website on other free submission website. like : Directory submission, social bookmarking, Forum, Article etc.

Search Engine
Directory
Bookmarking
Classifieds Article
BlogPosting
Blog Comment
Forum
Yahoo Answer
Q&A
Review Sub
Deeplink
PPT
DocumentSharing
BusinessListing
Image Sub
Video Sub
Ping Submission
Logo Submission
Youtube commenting

Some of the off page techniques are:
Social bookmarks
Deep links
Directory submissions
Article submissions
Blog commenting

off page
 

off page is another technique in SEO

off page techniques
1.Blog commenting
2.Article Submission
3.Directory Submission
4.Image/Video Submission
5.Guest Blogging

off page
 

Bookmarking and PR submission

On page Seo like Title,meta tags,anchor tags etc...,,,,
Off-page seo like a directory submission, classified, social bookmarking,
blog commenting, forum posting, document submission etc..,,,