What are digital media? 4 categories that matter
By teamnext Editorial Team
The term digital media sounds straightforward, but the definition becomes more complex on closer inspection. Digital media are not only contents that are digitally encoded. For a clear classification, it helps to define what a medium is and what digital encoding means.
The term medium originates from Latin and refers to “the middle”. A practical definition is:
• A medium stores and transmits information.
Information can be analog or digital. Digital information consists of discrete values and can be represented as sequences of zeros and ones. Analog information is continuous and does not exist as discrete values.
The material of storage media
Before computers became widely used, analog media dominated. Many analog media were tied to specific materials:
• books made of paper
• records made of shellac or vinyl
• photographic negatives made of celluloid
• tapes based on magnetic tape
With digital media, the material of the storage device is less important. Digitized books, music, and photos can all be stored on the same device, for example:
• hard drive
• DVD
• USB drive
Digital storage media are broadly universal. This universality does not apply to analog storage media.
From bytes to zettabytes
An early digital computer was the Zuse Z3 from 1941. It weighed around one ton. Its memory consisted of 64 words with 22 bits each, totaling 176 bytes.
A landmark example of digital imaging is the first digitally scanned image created by Russell Kirsch in 1957. It showed his son Walden and had a resolution of 176 × 176 pixels.
For the global transition, precise framing matters. Research on technological information capacity indicates that digital formats have dominated since the early 2000s, with a high digital share reported for 2007.
In terms of data growth, widely cited forecasts exist. A commonly referenced estimate based on IDC Data Age 2025 reporting states 175 zettabytes of global data by 2025. This is a forecast, not a measurement.
What types of digital media exist?
Four categories with examples
Digital media can be grouped into four categories:
• media content
• storage media
• media devices
• distribution channels
1. Media content
Media content refers to digitally encoded content, including:
• digital images, such as photos, illustrations, graphics
• digital video without audio, such as animations and silent films, and with audio, such as films and music videos
• digital audio, such as music, podcasts, audio dramas
• digital text, such as e books, online newspapers, blogs, documents such as PDFs
2. Storage media
Storage media store digital information regardless of content. Key non volatile storage media include:
• optical storage, such as CD, DVD, Blu ray Disc
• magnetic storage, such as hard disk drives and tape systems such as LTO
• solid state storage, such as SSDs, USB drives, flash memory cards such as SD or CF
Side note:
• removable hard drives are far less common today
• the floppy disk is a historical example of magnetic storage
Definition note:
• volatile storage includes RAM, which loses content when power is removed.
3. Media devices
Media devices are used to consume digital media, for example:
• PCs, such as laptops and desktop computers
• mobile devices, such as smartphones and tablets
• smart TVs and digital cinema projectors
• digital radio receivers
4. Distribution channels
Distribution channels deliver digital media. Common channels include:
• websites
• streaming services and media libraries
• digital radio, Digital Audio Broadcasting, DAB
• digital television, Digital Video Broadcasting, DVB
• messenger services
When digital media are published on the internet, they are often referred to as online media.
Paid media, owned media, and earned media
Another classification focuses on authorship and ownership. The terms originate in online marketing.
• Owned media refers to content produced in house and owned by the organization.
• Paid media refers to content placements or media purchased from content providers.
• Earned media refers to third party content created without direct compensation that reports positively about a brand, company, or product, such as blog posts, YouTube videos, Instagram posts, or podcasts.
Paid media can also apply when third parties create content but receive compensation, for example through influencer marketing or affiliate models.