Blogging, why write a Blog?

Went to a great lecture organized by the Sunshine Coast Council Libraries entitled:-
     How to write a killer blog. by Rhonda and Ernie

A blog is a conversation. 

There is the opportunity to comment (see below) and we can pursue a conversation online.  It is not a static website, it is alive.   Importantly, blog readers can read one another's comments. So when people do comment, ideas are extended far beyond whatever I come up with.   

There is never enough time in class for a good in depth conversation.  However, here on line, we can enjoy a exploring topics in some depth.