The 4 C’s of digital marketing are: Customer, communication, cost and convenience. You have to make sure you know your customers needs and what they want. The costs are important, because then you can figure out your Return on Investment. If you don’t know what your costs are, you don’t know what you get out of it. Convenience refers to the experience of the customer. It should be easy for the customer to go through the marketing funnel. Communication is the way your target audience receives the information they need, and when they need it.