A blog is a website where people can share their thoughts and ideas on a particular topic.
Blog is a form of social networking service. Bloggers not only produce content to post on their blogs but also often build social relations with their readers and other bloggers. However, there are high-readership blogs which do not allow comments. Many blogs provide commentary on a particular subject or topic, ranging from philosophy, religion, and arts to science, politics, and sports.
Others function as more personal online diaries or online brand advertising of a particular individual or company. A typical blog combines text, digital images, and links to other blogs, web pages, and other media related to its topic.
The ability of readers to leave publicly viewable comments, and interact with other commenters, is an important contribution to the popularity of many blogs. However, blog owners or authors often moderate and filter online comments to remove hate speech or other offensive content.