1. Advertising agency
There is a basic structure that most advertising agencies stick to. In the smaller agencies, some people will perform more than one role.
There are SIX major departments in any advertising agency. These can be split into other sub- departments, or given various creative names, but the skeleton is the same.
These departments are:
Account Service/ client services
Account Planning/ research dept
Creative/ or separate copy dept and arts dept
Finance & Accounts
Media Buying/ media dept
Production

2. Larger agencies may also separate out the following departments:
Human Resources & Facilities
Research
Web development

3. Accounts services/ client services
Efficient working of this department results in quick growth of ad agency.
Supplies necessary information to the clients.
It tries to increase and retain the number of clients of agency.
It brings new clients to the agency which is crucial for increasing revenue, expansion and growth.
It acts as a liaison authority (connection) between the advertising agency and its clients.

4. Creative dept/copy dept
The main function of a copy department of advertising agency is to prepare an attractive copy-of-ad.
The copy of advertisement is very crucial. It is called the Heart of the AD.
The staff of this department includes copywriters, copy-supervisors, and others. They use their talent of imagination, skill of putting flair and fluent language while preparing a copy.
The head of the dept is copy chief who directs the functioning of the dept

5. creative dept Some agencies have creative dept instead of a copy dept
copywriters and art directors are paired up, working as teams.
Everyone within creative services reports to the Creative Director. It is his or her role to steer the creative product, making sure it is on brand, on brief and on time.

6. Art dept
Transform the ad-message into a self-communicating and mind- stimulating imagery.
Prepare visuals and layouts for press advertisement.
Make painted bulletins, posters, illustrations, slogans, etc.
Art Director heads this department of ad agency. He is assisted by an assistant-art director, artists, visualizers and layout men.
The artists of art department work together with copywriters to make the final copy of advertisement more attractive.
Both departments of art and copy operates under the overall guidance and supervision of vice-president of creative services.
Not all ad agencies have a separate art department. Some prefer to outsource their art-related work to freelance artists.

7. Media dept
selects the best-media for advertising the products of the clients.
While selecting a media for advertising it must consider the following:
Nature of the product,
Competition in the market,
Advertising budget of the client,
Media trends, etc.

8. Media dept
Select and use the best media possible to communicate the ad message to the consumers. This is very important function because a wrong selection will result in the failure of product.
Prepare a media plan for clients.
Media scheduling.
Supervise the execution of the schedule.
Buy or book an advertising time and space in media for client. (reach and frequency)
Keep contact with various media.

9. This usually involves close collaboration with the creative department who came up with the initial ideas
collaboration with the client and the kind of exposure they want.
This department is usually steered by a media director.

10. Production dept Main role is to process and product the advertisement
Keep in contact with printing press, typographers, photo engravers, etc.
Assemble the typographic design patterns, engraved photos, illustrations, copy, etc. and prepare the final advertisement.
Show it to the client (advertiser) and get his approval for its release.
Send it (after approval) to print media like magazines, newspapers, etc. for advertising.

11. As digital media trend is emerging some tasks of the production dept change or are added on to:
Keep in contact with digital artists, web designers, etc.
Assemble the work of digital art and prepare a final digital-ad.
Seek approval of it from an advertiser.
Send it (after approval) to digital media like the Internet, e-magazines, web videos, etc. mainly for online advertising.
This department is headed by a production manager.

12. Account planning/Research dept
This dept researches into the following:
Market,
Market competition,
Market trends,
Products and/or services,
Competitors,
Consumer behavior,
Media trends,
New trends in advertising, so on.

13. Account planning/Research dept
a typical research department usually comprises of:
Investigators,
Field workers,
Analysts,
Marketing assistants,
Statisticians,
Librarian and the staff of library, etc.
This team works under the guidance and direction a Research Director, who is the head of research department
The research done aims at executing a good ad campaign

14. Accounts and finance dept
This takes care of financial and accounting matters
This department is responsible for handling payment of salaries, benefits, vendor costs, travel, day-to-day business costs, sending invoices to the client and everything else you'd expect from doing business.

15. Accounts and finance dept
People involved in the dept are:
Chief financial officer (CFO),
Accounts receivable manager,
Accounts payable manager,
Accounts supervisors and
Accounts executives.

16. Public relations dept
The main responsibility of a public relations (PR) department is to maintain cordial relationship between advertising agency, clients and media.
Generally, the PR department carries out following work:
Address the complaints of the customers.
Solve their complaints as soon as possible.
Be a link between ad-agency, clients, media and society.
Create goodwill and maintain the reputation of ad agency.
Head of dept is a public relations officer

17. Office management Recruit office staff.
Training and development of new joined staff.
Promotion of an existing staff.
Transfer of a timely salary and (perks) to staff.
Providing welfare facilities to staff.
Correspondence to various internal and external parties.
Filing and record keeping of all the important documents.