Web 2.0 submission is the online technique (it used to work better years ago, but it still works quite good). In this way or technique, you can share your content via hubpages, squidoo, blog sites etc. When reference a Web 2.0 for backlinking you’re referring to sites where users create the content
SEO blog submission is an off-page activity where users and owners of the website actively post articles related to the website. … By keeping the website up to date with relevant and interesting content, visitors are more likely to share and spread them.