The beauty of a blog is that it is not static like websites of yore. Blogs are interactive and ever changing. A blog that is put up and just sits there will only receive a limited amount of traffic. A blog that has a regular posting schedule, (at least once per week) will start to develop visitors because they are searching for information that you provide them. The point is to have them come back over and over again. Become the go-to person in your niche by providing valuable content to your readers.