Marketing is defined by the American Marketing Association as "the activity, set of institutions, and processes for creating, communicating, delivering, and exchanging offerings that have value for customers, clients, partners, and society at large". The term developed from the original meaning which referred literally to going to market with goods for sale. From a sales process engineering perspective, marketing is "a set of processes that are interconnected and interdependent with other functions of a business aimed at achieving customer interest and satisfaction".
Marketing is the process of teaching consumers why they should choose your product or service over those of your competitors, and is a form of persuasive communication. It is made up of every process involved in moving a product or service from your business to the consumer. Marketing includes creating the product or service concept, identifying who is likely to purchase it, promoting it, and moving it through the appropriate selling channels. There are three primary purposes of marketing:
During decline, demand for a good begins to taper off, and the firm may opt to discontinue the manufacture of the product. This is so, if revenue for the product comes from efficiency savings in production, over actual sales of a good/service. However, if a product services a niche market, or is complementary to another product, it may continue the manufacture of the product, despite a low level of sales/revenue being accrued. 
The advertising took place on Instagram and Google. Instagram generally isn't an advertising channel, but when used for branding, you can develop a base of followers that's primed for a gentle product announcement every now and again. Google was definitely used for advertising in this example; the company paid for space on Google -- a program known as pay-per-click (PPC) -- on which to drive traffic to a specific page focused on its product. A classic online ad.
Price refers to how much the company will sell the product for. When establishing a price, companies must consider the unit cost price, marketing costs, and distribution expenses. Companies must also consider the price of competing products in the marketplace and whether their proposed price point is sufficient to represent a reasonable alternative for consumers.
This refers to the process of setting a price for a product, including discounts. The price need not be monetary; it can simply be what is exchanged for the product or services, e.g. time, energy, or attention or any sacrifices consumers make in order to acquire a product or service. The price is the cost that a consumer pays for a product—monetary or not. Methods of setting prices are in the domain of pricing science.  How To Start A Digital Marketing Agency With $0 Investment [Part 1]
Growing a business isn't easy. First, you need a viable idea. From there, you need to discover a profitable niche, define a target demographic and have something of value to sell them. Whether you're peddling products, services or information, getting the word out has become increasingly burdensome. And without the right marketing strategies to fuel your growth, churning a profit and staying afloat is virtually impossible.
A firm focusing on a production orientation specializes in producing as much as possible of a given product or service in order to achieve economies of scale or economies of scope. A production orientation may be deployed when a high demand for a product or service exists, coupled with certainty that consumer tastes and preferences remain relatively constant (similar to the sales orientation). The so-called production era is thought to have dominated marketing practice from the 1860s to the 1930s, but other theorists argue that evidence of the production orientation can still be found in some companies or industries. Specifically, Kotler and Armstrong note that the production philosophy is "one of the oldest philosophies that guides sellers... [and] is still useful in some situations."
^ Brown, L., Competitive Marketing Strategy: Dynamic Manoeuvring for Competitive Position, Melbourne, Nelson, 1997; West, D., Ford, J. and Ibrahim, E., Strategic Marketing: Creating Competitive Advantage, Oxford, Oxford University Press, 2010, p. 50-56; Schaars, S.p., Marketing Strategy, The Free Press, 1998, [Chapter 4 - 'A Brief History of Marketing Strategy'], pp 18-29