We get this question alot. Early on, when Blogs were first used, it was built separately from your website. And currently there are still free “bloggers” that you can setup, separate from your website.
But there are some, such as WordPress, where you can combine your website with a blog page. We specialize in wordpress sites, and can create a combined site for you. That way you have the benefits of a multipage website, as well as a page for posting to a blog.
Search Engines love blogs. So a blog in your website helps with creating fresh content and your ranking in the search engines.