Advertising and marketing are two concepts where the objective is the same. Marketing and advertising have many things in common, but they are still very different.
Marketing involves design, creation, research and data mining about how to optimize the idea of a product or service with the target audience. Marketing paints a well-defined image of the product.
Advertising is the process of making a product and service known to an audience. It is the description used to present the product, idea or service to the world. This generally entails advertising campaigns in the media. An advertising campaign uses creative positioning in the media. Advertising must be timely and used in a specifically strategic way.
To sum it up Advertising is making your product and service known to an audience. Marketing is both research and practice, while advertising is simply the practice.