What is a web 2.0 property?
What is web 2.0 in SEO?
https://www.quora.com/What-is-Web-2-0-in-SEO
What’s the importance of web 2.0 properties in SEO?
Why do you need a web 2.0 SEO strategy?
What are some web 2.0 seo techniques?
What are the best sites to get web 2.0 backlinks?
How do you get some web 2.0 backlinks?
Where to buy web 2.0 backlinks?