Blog generally refers to an entire website dedicated to writing individual blog posts, or the single page on a website that houses those posts. Blogging started out as something of an online public diary (it’s a shortened version of the word ‘weblog’) but covers any number of topics now. Businesses blog as a way of promoting products or sharing useful information, and frequent posting is an important component of SEO strategy. The individual article is a called a post, or blog post. The words ‘blog’ and ‘blog post’ are often used interchangeably.