Defining su.pr is relatively simple. It is similiar to stumbleupon because it draws attention to posts and therefor traffic to your site. Su.pr is by stumbleupon which makes it interlinked and valueable to anyone that is already using stumbleupon.
Follow these quick and easy steps to become a master at su.pr
1. Open your web browser that has the stumbleupon toolbar installed
2. Make sure you are signed into stumbleupon
3. Type su.pr into the address bar (not the search)
4. A page opens with what looks like a tweet box because it is just that
5. Copy and paste a tweet from any blog post that you would like more traffic on
6. Now, you can tweet it out immediately (press post) or you will see a schedule button where you can schedule the tweet to go out at a certain time or on a certain day.
7. Once the tweet goes out, you can refresh the page to see how many people have clicked on it (top number) and how many of those people were stumblers (bottom number)
8. That’s it! Enjoy the traffic!
If you have further questions, I’ll be happy to try and answer them for you.