To overcome the deficiencies of the 4P model, some authors have suggested extensions or modifications to the original model. Extensions of the four P's are often included in cases such as services marketing where unique characteristics (i.e. intangibility, perishability, heterogeneity and the inseparability of production and consumption) warrant additional consideration factors. Other extensions have been found necessary for retail marketing, industrial marketing, and internet marketing
Digital Marketing Channels are systems based on the Internet that can create, accelerate, and transmit product value from producer to a consumer terminal, through digital networks.[55][56] Digital marketing is facilitated by multiple Digital Marketing channels, As an advertiser one's core objective is to find channels which result in maximum two-way communication and a better overall ROI for the brand. There are multiple digital marketing channels available namely;[57]
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:
Research and testing: Before you can take your idea public, you should perform marketing research and testing. Marketing departments usually test new product concepts with focus groups and surveys to gauge consumer interest, refine product ideas, and determine what price to set. Researching your competitors can help you set an optimal price and generate ideas for positioning your brand in an existing market.
A fourth question may be added to the list, namely 'How do we know when we got there?' Due to increasing need for accountability, many marketing organisations use a variety of marketing metrics to track strategic performance, allowing for corrective action to be taken as required. On the surface, strategic planning seeks to address three simple questions, however, the research and analysis involved in strategic planning is very sophisticated and requires a great deal of skill and judgement.

^ Porcu, L., del Barrio-Garcia, S., and Kitchen, P.J., "How Integrated Marketing Communications (IMC) works? A theoretical review and an analysis of its main drivers and effects/ ¿Cómo funciona la Comunicación Integrada de Marketing (CIM)? Una revisión teórica y un análisis de sus antecedents Efectos," Comunicación y Sociedad, Vol. XXV, Núm. 1, 2012, pp. 313–48
Where your marketing campaigns live depends entirely on where your customers spend their time. It's up to you to conduct market research that determines which types of marketing -- and which mix of tools within each type -- is best for building your brand. Here are several types of marketing that are relevant today, some of which have stood the test of time:

The marketing discipline had its origins in the early 20th century as an offspring of economics. Economic science had neglected the role of middlemen and the role of functions other than price in the determination of demand levels and characteristics. Early marketing economists examined agricultural and industrial markets and described them in greater detail than the classical economists. This examination resulted in the development of three approaches to the analysis of marketing activity: the commodity, the institution, and the function.
The production department would then start to manufacture the product, while the marketing department would focus on the promotion, distribution, pricing, etc. of the product. Additionally, a firm's finance department would be consulted, with respect to securing appropriate funding for the development, production and promotion of the product. Finance may oppose the required capital expenditure since it could undermine a healthy cash flow for the organization.
Research and testing: Before you can take your idea public, you should perform marketing research and testing. Marketing departments usually test new product concepts with focus groups and surveys to gauge consumer interest, refine product ideas, and determine what price to set. Researching your competitors can help you set an optimal price and generate ideas for positioning your brand in an existing market. What Is Digital Marketing? And How Does It Work?
×