As I said in Blogging 117, blogs enable conversations, and one key way those happen is through comments. And comments you leave on other blogs have the additional benefit, if you comment thoughtfully, of encouraging readers of those blogs (and perhaps the authors) to visit your blog and see what you have to say.
Trackbacks are a special kind of comment that require special mention and explanation, because they involve some mysterious lingo that isn’t intuitive.
In essence, a Trackback is a comment on someone else’s blog post that you leave on your own blog. It’s sort of a mega-comment.
Here’s how it works.