A blog post is a short, informal piece of writing that typically discusses a single topic. A newsletter, on the other hand, is a longer, more formal piece of writing that typically discusses several topics.
One main difference between a blog post and a newsletter is that a blog post is usually less formal than a newsletter. A newsletter is typically written in a more formal style, with more sections and subsections.
Additionally, newsletters are often designed to be read one after the other in order, rather than being scattered throughout the internet like blog posts.
The final difference between a blog post and a newsletter is that blogs are typically published on a regular basis, while newsletters are not always published.