On Page Optimization: On Page Optimization is the doings that is done on the page for search engine ranking like using alt tags, keywords is meta tag, tool tip and closeness, keyword-density, proper usage of keywords in title tags.
Off Page Optimization:
Off Page Optimization is the doings that are done on extra sites for our site to increase search engine ranking. Off Page Optimization activities contain directory submission, article submission, forum discussion, blog posting, press release, blog commenting, white paper submission and along with this social bookmarking (in dig, delicious, stumbleupon) and social media support (in face book, twitter, LinkedIn). Off page optimization creates well-built back links for our site which not only helps for search engine ranking but also for make traffic from sites where we have done all these submissions.
