Pinging and Trackbacking

I initially was having a hard time understanding what this problogger article meant when they referred to trackbacks and pinging as ways of increasing interactivity within one's blog until I watched the video below.

I now understand that:
1) Trackback is a way to let a blog author know that you are either responding to their blog post in your blog or your posting something similar to their content.
2) Pinging is when a ping is automatically sent to a pinging/aggregator software everytime you update your content.

For trackbacking, I am using code generated at http://www.trackbackr.com