Hey guys so i'm a nube, I want to ask some nube question if you guys can answer it I would be highly appreciated. Here is the situation, I have a tumblr blog and it has 12k followers 2k uv 6k pv each day. it is basically like a gallery blog, if you want to check it out here it is my user name but I changed the url so you need to be redirected. Here are some of my few questions. -Can I improve my seo score by adding h1, h2, h3 tags with one single word? -What are some few keywords you could think of to improve my blog? -Can anyone explain me what PR mean and how do you use backlinks?( I saw someone on bhw posting a text with 450 backlinks but I dont know what it is and how to use it). Thanks for answering my bhw brothers and sistas!