QUOTE(carrycash @ Jun 20 2014, 01:25 PM)
Search Engine Optimization is two type On page and Off page. There are both activity is important and On page is the process of optimization a website which includes on site work as writing content, title, description, Alt tag, Meta tags can be indexed and crawled be search engine properly. Off page method include various method of seo including Blog comment, Directory Submission, Social bookmarking, Press release, Article submission, Forum Posting and forum Profile.
Agree with carrycash.
In fact all parts are equally important to me.