What is Trackback?

What are these trackback links anyway.

A post in a blog 1 that refers to a post in blog 2 automatically gets a link in the post in blog 2. Does that make sense? The cross links show up as comments in the referring posts.

Here are some articles to read:

http://en.wikipedia.org/wiki/Trackback

http://www.plasticbag.org/archives/2003/03/what_is_trackback_part_one/

Here’s another post in this blog: Trackback Two