The 5 D’s of Digital Marketing are:

Digital Devices
Digital Platforms
Digital Media
Digital Data
Digital Technology
Digital Devices

Digital Devices include the devices that people use almost everyday. These can be used to target an audience for marketing purposes.
Laptop and desktop computers
Mobile phones
Tablets
Smart TVs
Gaming devices
Smart watches

Digital Platforms
These are the platforms users interact with on a regular basis. They can be used for marketing purposes:
Social media
Search engines
Websites

Digital Media
Digital Media are paid and / or owned channels that can be used to reach your audience. They include:
Online advertising
Social media marketing
Messaging
Email marketing

Digital Data
Digital Data are data about your target audience being used to achieve a marketing goal. Generally, data about your target audience can be captured via:
Contact forms
Surveys
Apps

Digital Technology
Digital Technology is all about the technology being used with a marketing objective. Some examples are:
Artificial intelligence (AI)
Augmented reality (AR)
Virtual reality (VR)