Some business ventures feel that blogging is not a necessity for their website because their business has no need or topic for blogging. If someone is selling something like fish hooks, they might feel like their topic is not good enough for a blog, but you can create a blog that talks about everything related to fishing hooks. About all kinds of fish species, or displaying videos of people using hooks, etc.
The important thing is to continuously come up with interesting blog topics that you can publish and this is going to allow you to maintain a good and strong presence online.