creation of 5 blogs and bookmarking each blog 20 times makes 100 social bookmarking See the graph here: http://www.bcsearchengineoptimization.com/wp-content/uploads/2011/01/CyclicFlow2.jpg What are the pros and cons? how does this help SEO?
No cons.Lots of pros. Pro = more traffic, and more authority. Google loves to see that Social Bookmarking sites are pointing to your websites because that means people are interested in them.
Pro: helps your site getting quality links from the blogs because the linkwheel of your web 2.0's is getting links from bookmarks. Con: If you close your linkwheel, google will easily detect it and devalue the links. If that happens, all your bookmarking efforts have gone to waste.