A weblog (or simply blog) is a website that ‘publishes’ or features articles (which are called ‘blog posts’, ‘posts’, or ‘entries’), written by an individual or a group that make use of any or a combination of the following:· Straight texts· Photographs or images (photoblog)· Video (videoblog)· Audio files (audioblog)· HyperlinksUsually presented and arranged in reverse chronological order, blogs are essentially used for the following purposes:· Online journal or a web diary· Content managament system· Online publishing platformA typical blog has the following components:· Post date -the date and time of the blog entry· Category – the category that the blog belongs to· Title – the title of the blog· Main body – the main content of the blog· RSS and trackback – links the blog back from other sites· Comments – commentaries that are added by readers· Permalinks – the URL of the full article· Other optional items – calendar, archives, blogrolls, and add-ons or plug-insA blog can also have a footer, usually found at the bottom of the blog, that shows the post date, the author, the category, and the ‘stats’ (the nubmer of comments or trackbacks).There are numerous types of blogs. Some of them are the following:1. Political blog – on news, politics, activism, and other issue based blogs (such as campaigning).2. Personal blog – also known as online diary that may include an individual’s day-to-day experience,Omg Blog complaints, poems, and illicit thoughts, and communications between friends.3. Topical blog – with focus either on a particular niche (function or position) that is usually technical in nature or a local information.4. Health blog – on specific health issues. Medical blog is a major category of health blog that features medical news from health care professionals and/or actual patient cases.5. Literary blog – also known as litblog.6. Travel blog – with focus on a traveler’s stories on a particular journey.7. Research blog – on academic issues such as research notes.8. Legal blog – on law (technical areas) and legal affairs; also known as ‘blawgs’.9. Media blog – focus on falsehoods or inconsistencies in mass media; usually exclusive for a newspaper or a television network.10. Religious blog – on religious topics11. Educational blog – on educational applications, usually written by students and teachers.12. Collaborative or collective blog – a specific topic written by a group of people