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The Digital Divide refers to the gap between individuals, households, businesses, and geographic areas at different socio-economic levels with regard both to their opportunities to access information and communication technologies (ICTs) and to their use of the Internet for a wide variety of activities. Its relevance today is highlighted by the impact it has on education, economic opportunities, and social inclusion.

Information Overload describes the difficulty in understanding an issue and making decisions caused by the presence of too much information. It is increasingly relevant today due to the vast amount of data created by digital media which can lead to analysis paralysis or decision fatigue.

CMC refers to any human communication that occurs through the use of two or more electronic devices. It's relevant today as it encompasses a variety of formats such as email, instant messaging, and social networking, revolutionizing how we interact with others.

Uses and Gratifications Theory suggests that media users play an active role in choosing and using media to satisfy their needs. With the proliferation of digital media, it's relevant today in understanding why individuals engage with certain online content over others.

Hyperpersonal Communication is a communication theory that suggests people develop deeper relationships online than they would in person, due to factors like selective self-presentation and over-attribution. It's relevant today as social media platforms and online dating continue to shape interpersonal relationships.

Network Society is a concept introduced by sociologist Manuel Castells, which refers to a social structure made up of networks facilitated by digital technologies. It is relevant today because it emphasizes the shift towards interconnectedness and the influence of this structure on economics, politics, and personal interactions.

Media Richness Theory classifies communication media by their ability to reproduce the information sent over them. It remains relevant in determining the effectiveness of digital communication channels, such as video conferencing versus text messaging, especially in professional settings.

Cultivation Theory postulates that long-term exposure to media content can shape a person's perceptions of reality. Today, this is relevant in the digital context as the pervasive nature of online media can influence societal norms and individual worldviews.

The Third-Person Effect hypothesis suggests that a person exposed to a persuasive communication will tend to believe it will have a stronger effect on others than on themselves. In digital context, it influences how individuals consume and trust online content, such as news or advertisements.