Followers following through google friend connect and through blogger will usually see your blog through their lists of blogs that they're following. Or, if followers sign up for RSS feed, a reader, or email subscription, they can read your blog that way. It depends on how they choose to follow you.
Bloggers blog about whatever they choose. If you want to mainly talk about your shop, you can. But you can also share your interests, or offer tutorials. People love tutorials. People also love pictures!
Hope this helps you! Include your blog link, and I'll check it out and follow.
Here's mine:
2justByou.blogspot.com