The word 4A originated in the United States, The American Association of Advertising Agencies abbreviation, Chinese for "American Association of Advertising Agencies".
Because there are four words in the name that start with the letter A, it is abbreviated to 4A. Later, all over the world as a standard, take it to engage in the advertising industry, eligible, organized core rules, and then change the U.S. national title to their respective countries or regions, the formation of the regional 4A advertising agencies.
Expanded Information:
4A Criteria
The 4A's Association has very strict criteria for its member firms, and all 4A's are large, comprehensive, multinational advertising agencies.
4A advertising agency internal planning is very detailed, most of the different services according to the customer will be divided into several groups, the top of the creative director, the following art director (art director), copywriter, designer (also known as the completion of the draft, different from the production of the domestic small companies with the ability to design).
The creative director is usually a foreign or Hong Kong and Taiwan senior advertisers, most of them are copywriters. Art director is mostly a high-level domestic designers, with some creative ability, copywriter that is, a master of creativity and writing.
Baidu Encyclopedia - 4A Advertising Agency