The word "blog" ranks highly among the silliest words invented by the internet community. It sounds like a state of utter unmotivation experienced by a large, science fiction creature. In actuality, "blog" is short for "web log". As the term implies, the author (the website owner or a designated representative) writes and posts a public entry of topics, ideas, facts, and opinions to provide a coherent chronicle relating to the website. That's a technical definition. The results, as you no doubt know, range greatly in purpose and readability.