Blogs are an extremely valuable form of content writing
I'll be brief. Your online business needs to have a weblog. Google loves fresh content, incase you haven't heard.
Content writing matters - and blogs are a very clever way of going about this. Your site will have a massively higher chance of having it's pages and links indexed; it's arguably the new SEO; your audience will be entertained and will want to follow you, and most of all – they'll believe in you. I could go on, but hey - these guys say it so well.