Ok so I stumbled upon a concept that I have never heard of before. It's called tag and ping and I kind of get the basics but I have some questions. First of all, am I right in thinking that all it really involves is adding tags to your site and then pinging sites like technorati? What does this do exactly? I know what pinging involves but I have never used tags before. If i wanted to ping lots of sites like technorati would I have to add lots of tags to each page of my site? How will this help SEO and link building etc..