A blog is often a mixture of what is happening in a person's life and what is happening on the Web, a kind of hybrid diary/guide site, although there are as many unique types of blogs as there are people.
People maintained blogs long before the term was coined, but the trend gained momentum with the introduction of automated published systems, most notably Blogger at blogger.com. Thousands of people use services such as Blogger to simplify and accelerate the publishing process.
Blogs are alternatively called web logs or weblogs. However, "blog" seems less likely to cause confusion, as "web log" can also mean a server's log files.
A blog is a webpage made up of usually short, frequently updated posts that are arranged chronologically — like a what's new page or a journal. The content and purposes of blogs varies greatly — from links and commentary about other websites, to news about a company/person/idea, to diaries, photos, poetry, mini-essays, project updates, even fiction.