If I have my own blog and I make posts there, it is better if I go to my social profiles (g+, tumblr, facebook, pinterest, etc) and I copy/paste the same content of that post, or it is better if I just put there a link with a small excerpt to tease the user to click on the link to read the full story? Which strategy is better, or maybe there is a third better strategy that I didn't mention here? How can Improve my authorship rank using social media?