The HTML5 element used for independent content such as a blog post is <article>. It represents a self-contained composition that could stand on its own or be distributed separately.
Typical examples include blog entries, news stories, forum posts, product cards, and user comments. A page can contain many <article> elements, and an article can contain nested articles when the inner content is independently meaningful, such as comments attached to a post. Articles commonly include a heading and may identify an author or publication date.
The main distinction is semantic purpose. <div> is a generic container, while <section> groups a thematic part of a document and may not be independently distributable. <main> identifies the page’s dominant content area and normally appears only once. Using <article> gives browsers, assistive technologies, search tools, and developers a clearer description of the content’s structure.