when we say "make web 2.0's" or "web 2.0 social sites", what exactly do we mean by that? are they anything that i would call a blog? wordpress, blogger ect... or is it more broad, like wordpress, twitter tweets, wiki's, yt videos ect...? also, when people say to make backlinks with different ip's, does that mean diversify platforms? ex:all wordpress sites are considered to be the same ip, and all twitter tweets considered to be the same ip, all twitter tweets considered the same ip ect...? or is that something different?