Same question. I have heard it used to mean there is no one central server but a lot of people put their servers together. I don't understand it in this bloggi

Same question. I have heard it used to mean there is no one central server but a lot of people put their servers together. I don't understand it in this blogging context because you can always put up your own blog on your server. How is running your blog or blogging platform on your own server different from other blogs or platforms?