Explanation:

In terms of a career, promotion refers to advancing an employee's rank or position in a hierarchical structure. In marketing, promotion refers to a different sort of advancement. A sales promotion entails the features—via advertising or a discounted price—of a particular product or service. Product promotions can also be classified as "sales" or "specials."
A promotion can occur in a variety of ways from business, marketing, and careers. Companies and small businesses often use product promotions as a marketing tool to bring in customers. The promotion of a product is designed to shine attention to a new brand or a certain item. For example, a marketing promotion can introduce a special food item in a restaurant or a buy-one-get-sale at a supermarket.

When a career promotion occurs, usually not only a title changes, but often a salary bump.