Marketing and advertising go hand in hand. Proper coordination and communication is highly desirable in such jobs.
There is a professional course called "Bachelor of Advertising" which teaches o promote and advertise the products of their company. It emphasizes on the execution of advertising techniques intended to promote and sell products, services, and brands.Careers which are outcome of this course can be creative director, art director, media copywriter, direct advertising copywriter or graphic designer. Few ad agencies can also hire you if you have one such degree.
Well, your salary can vary depending upon your performance and the amount of progress you show and the profit you bring to the company.Its similar to the marketing business.
Sometimes you have have to directly be in contact with your client, go to client places for campaigns and be a part of it.Else you can sit in your cabin and set up advertisements in newspapers/magazines etc as per your client specifications.
You can be an "outdoor advertising manager" takes care of campaigns needed for the advertising.
The "content manager" takes care of the content which need to appear in the advertisement.
Advertising department is the biggest division in any ad agency. You will have each individual assigned to a particular job for taking care of emails,or letters, or telephonic calls, or websites or client meetings related to advertisements.
On the whole advertising career is booming, and as long as the new products are coming up the future of advertising is bright.