Hi, I have some questions about SEO listing below: 1. I have submitted several articles to article directories, and some links to link directories, how do I know they link to me? Any software program can help me find out? 2. How do I let Google notice my back links or articles on other sites? If I have submitted links and articles, it's worthless if google doesn't index them. 3. How to make those back links last longer? 4. How to improve the number of "link in" on Alexa, I think that number really shows the quality of back links.