Content - in a broad sense, it is the substance of a website, its fillings, which are based on various materials: news, articles, drawings, photographs, tables. Usually, materials are either provided by the client themselves or are written specifically to order under specified conditions. The criteria for selecting content include: volume, reliability, relevance, uniqueness.
One of the conditions for proper organization of a resource is the maximum possible separation of design from content. This means that when editing information, you should not create new pages, HTML tags, and styles.