I get the idea that they provide linkage between posts and other blogs that reference those posts, but why? Is it sort of a modern equivalent of calling cards--like "Sam came to visit today and wrote something about this post on her blog." Does it make any difference in (gee, I was going to say rankings, but...I am not even sure if that would apply here) anything external to the blog? Act as a useful traffic driver? Let you know your fellow bloggers are thinking and writing about the same topics as you?
I am technical enough that if I care about them I am sure I can figure out how to use them, but I apparently need to be shown the light on them.
- What's the point?
- What's the payoff?
- What's the downside?
- What's the frequency, Kenneth? (mass creds to those who get the reference)