A blog is a type of website or online platform where individuals or groups of people share their thoughts, opinions, or information on various topics. Blogs can focus on a wide range of subjects, such as personal experiences, hobbies, travel, fashion, technology, or business.

The term "blog" is short for "weblog," which refers to a regularly updated website or platform that displays entries or posts in reverse chronological order. These entries, known as blog posts, are typically written in an informal and conversational style.

Blogs often allow readers to leave comments and engage in discussions with the blog author and other readers. This interactive nature distinguishes blogs from static websites, as it encourages active participation and community building.

Many blogs are run by individuals or small groups and offer a personal perspective or unique insight into a particular topic. However, there are also professional blogs run by companies or organizations that provide information, advice, or news related to their industry.

Blogging has become increasingly popular over the years, with millions of blogs covering a vast array of subjects. It has become a platform for individuals to express themselves, share knowledge, connect with like-minded people, and even monetize their content through advertising or sponsored partnerships.