A blog (a truncation of "weblog") is an informational website consisting of discrete, often informal diary-style text entries (posts). Posts are typically displayed in reverse chronological order so that the most recent post appears first, at the top of the web page.

Blogs are a type of regularly updated websites that provide insight into a certain topic. The word blog is a combined version of the words “web” and “log.” At their inception, blogs were simply an online diary where people could keep a log about their daily lives on the web.