Why blog?
scripting.com/2014/03/01/whyBlog.html
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
The mission of blogging is to empower all of us to go directly to each other with our expertise. So if you know something as well as anyone else, or you learn something or know something that should be shared, then you should share it on your blog.