Sometimes I wonder if our blog writing is a poor substitute for talking things through -- a way to say things that are too difficult in person. If we're so close, shouldn't we be able to speak our mind face-to-face? I've come to the conclusion that, in our relationship, both are critical: our writing opens a conversation on the page that is almost always continued on the phone or in person.
Every time you create a blog post you're creating a new/unique page online (on the internet, across search engines). This means that you're increasing your chances of ranking in search results, having other websites link to you, and your post/blog being shared on social media. All of this results in new traffic to your site.