Originally Posted by webmaster98 after panda update, its need to know What has become priority for the search engine ? Is it content or back links ?

It is a well known fact that the Panda update was about quality content, targeting content farms and spam sites.
Fresh, unique and quality content is just as important as having strong, relevant inbound links from authoritative sources. In order to be successful online, you have to have both content and backlinks. You can't really have one without the other. I don't see how could someone be successful only with content and no link building campaign or vice versa...

Keep in mind though, that a website should be build for the human visitors, that is potential customers, and not the search engines. Follow the search engine quality guidelines and you will do just fine.