Social media is a broad term that encompasses a wide range of interactive digital platforms and tools that enable users to create, share, and interact with content, information, and each other. The key characteristics of social media include:

1. *Interactivity*: Social media allows users to engage with each other and with content in real-time.

2. *User-generated content*: Social media platforms enable users to create and share their own content, such as text, images, videos, and live streams.

3. *Virtual communities*: Social media platforms provide a space for users to connect with others who share similar interests, hobbies, or demographics.

4. *Networking*: Social media enables users to build and maintain relationships with others, both personal and professional.

5. *Aggregation*: Social media platforms collect and organize content from various sources, making it easily accessible to users.

Examples of social media platforms include:

- Social networking sites like Facebook, Twitter, and LinkedIn

- Photo and video-sharing platforms like Instagram, YouTube, and TikTok

- Blogging and microblogging platforms like WordPress and Medium

- Social bookmarking and news aggregator sites like Reddit and Quora

- Virtual worlds and online communities like Second Life and Discord

Social media has revolutionized the way we communicate, interact, and share information, and has had a profound impact on modern society and culture.