Hello, can you help me please find an answer to the next questions? I've done a lot of research on the net, butstill haven't found the answers. There we go : 1. What is the difference between rss feed submission and pinging? 2. Are feedping.com and pingler.com used for different purposes? 3. How often should we submit our rss feed? What is a good frequency? 4. How often we should ping our website? 5. If i use WordPress which already has a ping feature, should I still submit the rss feed? 6. What is the difference between rss directories and rss aggregators? Thanks in advance