Are Web 2.0 Sites Effective for Increasing Your SERP Ranking?

Are Web 2.0 Sites Effective for Increasing Your SERP Ranking?

It's funny but some people still don't know what "web 2.0 sites" are. Or what even makes a site a Web 2.0 site a Web 2.0 site in the first place. Let alone how they can help improve SERP ranking.

Wikipedia says that; "Web 2.0 describes World Wide Web sites that emphasize user-generated content, usability, and interoperability."

Types of Web 2.0 sites are social media sites and applications that include forums, micro blogging, social networking, social bookmarking, social curation, and wikis for example.

And considering how the majority of Web 2.0 sites are usually high authority sites which go on to provide better search engine rankings, why don't more people use Web 2.0 as a way to increase SERP ranking with seeing as they are all mostly free to use anyway?

It seems to me that Web 2.0 sites are mostly very overlooked and underrated by webmasters who are trying to improve their SERP ranking. Why is this?

I've personally seen better rankings when using Web 2.0 blogs because they're a platform that let you create a "home" on them that is basically a reflection of your website and then let you link to your site with is what's mostly a do follow link. Also these can rank highly on their own as well without even needing much SEO!

So why aren't more webmasters using them to increase SERP ranking with? Is it because they don't know what they are so much yet still? Or because of some other reason like having to actually build them and maintain them? Not that they take much maintenance - they are basically set-and-forget. You just create the account, choose a theme, add your content, images, videos etc and that's about it.

Plus they make such great tier 2 backlinks as well which you can link the life out of and if there's any adverse effect on them it only effects that Web 2 and not your actual site.

Whenever I'm building links to my new site. I always start with creating homes on the top Web 2.0 sites and blogs. It has to be done properly though. You can't just whack an article on them linking to your site and expect that to be enough. Although that's pretty much all there is to it. You don't want them to look "commercial" as though they have been created for that purpose only as usually they will get pulled down pretty quickly.

I just wonder why I don't see more emphasis being put into Web 2.0 sites by webmasters who want to increase their SERP ranking with. They're not like article directories that have mostly been deindexed or whacked by Google (EA for example). They rank high on their own and provide long lasting dofollow contextual backlinks to your site. So why don't more people use them in their link building techniques?

Are Web 2.0 sites being overlooked by people and do you think they can be effective at improving your SERP ranking with on their own or when used with other SEO methods?