Many Internet Marketers uses Web 2.0 websites to build backlinks for their websites. And main thing is we can easily create these type of backlinks. And Google loves these type of backlinks. These websites are user friendly, non-technical and free to use.
Web 2.0 sites are generally high authority, so we can safely use them for building backlinks. Web 2.0 came in the year 2005. And quickly became popular now. Most of the webmasters prefer these type of websites.