What does it mean to blog?

To my mind, to blog is a way to publish everything you want to share with others on Internet, for example, vanity tips, cooking recipes, learning lessons, reviews or it can even be a personal diary. To blog is free, thus it provides an opportunity to people who don’t have enough money to  pay for the publication of their writings.  In addition, if your blog is public, you can interact with the readers, which, I think, is excellent because it means your writings awake the interest of others. Finally, regarding the blog’s appearance, it is possible to personalize it (colors, organization, name, so forth…).