Drupal is a content management system (also refered to as CMS), meaning Drupal is used to manage content on informational sites, social media sites, member sites, intranets and web applications.
Advertising and marketing are related with key differences. While advertising is a part of marketing, they are actually two distinct disciplines. Advertising is the act of getting the word out to consumers about a product or service. Marketing is the larger process of successfully selling products or services to the consumer from start to finish. Marketing may begin as early as the research and development stage and involves market research, product development, pricing, sales strategies, distribution, advertising and public relations. Advertising, therefore, is only one part of the marketing process.