I let this lapse for a few weeks because things were just nuts. Sorry about that, everyone.
Good websites and related blogs can easily go hand-in-hand. Most of my blogging experience is with Wordpress and Blogger. These are good options because they're free and have a large following of members.
In my experience, Blogger is better for business use, due to their Terms of Service. For Wordpress to be effective for a business, you'd have to host a copy of it on your own server. The server-side version doesn't really have good spam controls, IMO.
A blog can serve helpful purposes. One is to provide a way to interact with your visitors. Blog discussions can be quite lively at times, as I've learned from experience.
Blogs can also be good substitutes for newsletters and other mailing lists. Social media is more of a big deal today than email. Most blogging platforms offer good social media integration for sharing and updating.