Blogger (formerly Blogspot until 2006) is a blog publishing system. It was created by Pyra Labs, which was bought by Google in 2003. The service itself is located at www.blogger.com, and blogs that do not publish to their own websites are hosted by Google at subdomains of blogspot.com.

A blog (a contraction of the term "weblog") is a type of website, usually maintained by an individual with regular entries of commentary, descriptions of events, or other material such as graphics or video. Entries are commonly displayed in reverse-chronological order. "Blog" can also be used as a verb, meaning to maintain or add content to a blog.
Many blogs provide commentary or news on a particular subject; others function as more personal online diaries. A typical blog combines text, images, and links to other blogs, Web pages, and other media related to its topic. The ability for readers to leave comments in an interactive format is an important part of many blogs. Most blogs are primarily textual, although some focus on art (artlog), photographs (photoblog), sketches (sketchblog), videos (vlog), music (MP3 blog), and audio (podcasting). Micro-blogging is another type of blogging, featuring very short posts like Twitter.