Digital marketing poses special challenges for its purveyors. Digital channels are proliferating rapidly, and digital marketers have to keep up with how these channels work, how they're used by receivers, and how to use these channels to effectively market their products or services. In addition, it's becoming more difficult to capture receivers' attention, because receivers are increasingly inundated with competing ads. Digital marketers also find it challenging to analyze the vast troves of data they capture and then exploit this information in new marketing efforts.
^ Fisk, R.P., Brown, W., and Bitner, M.J., "Tracking the Evolution of Services Marketing Literature, Journal of Retailing, vol. 41 (April), 1993; Booms, B. and Bitner, M.J. "Marketing Strategies and Organizational Structures for Service Firms" in James H. Donnelly and William R. George (eds), Marketing of Services, Chicago: American Marketing Association, 47–51; Rafiq,M. and Ahmed, P.K. "Using the 7Ps as a Generic Marketing mix: An Exploratory Survey of UK and European Marketing Academics", Marketing Intelligence & Planning, Vol. 13, no. 9, pp. 4–15
This refers to how the product gets to the customer; the distribution channels and intermediaries such as wholesalers and retailers who enable customers to access products or services in a convenient manner. This third P has also sometimes been called Place or Placement, referring to the channel by which a product or service is sold (e.g. online vs. retail), which geographic region or industry, to which segment (young adults, families, business people), etc. also referring to how the environment in which the product is sold in can affect sales.  5 Digital Marketing Skills to Master for 2020 & Beyond