Today, blogs still serve this function, but they have also grown to be much more. Like most things Internet, the concept of a blog is very flexible. Some blogs function almost exactly like websites; others are practically online magazines. Some blogs are used for keeping in touch with a small group of people.
The majority of blogs, however, are basically themed notebooks where the author posts new entries on a regular basis and readers read them. Blog posts take on many different forms and often include words (always a good start), images, video and sound recordings.
And what do people write blogs about? The answer is everything. Yes, there is a blog on absolutely everything. Close your eyes, randomly pick three words in the dictionary, combine them together and there will be at least one blog on that topic (I just did this and got “stream”, “squirrel”, and “mace”. I bet there’s a blog out there all about gangster squirrels that mace intruders who try to cross their streams).