The following definitions are from Google (Oxford dictionary):
Websites and applications that enable users to create and share content or to participate in social networking. [1]
& Wikipedia:
... interactive technologies that facilitate the creation, sharing and aggregation of content (such as ideas, interests, and other forms of expression) amongst virtual communities and networks. [2]
Then, that would include HN, Discord and various online games imho. There's more about profiles / services in the Wikipedia page. That said, such definitions feel like they would also include emails / Discourse etc. Mailing lists feel like they could be considered part of "social media". Sending emails to family or close friends doesn't. So perhaps one needs to separate the platform from its various applications?
Websites and applications that enable users to create and share content or to participate in social networking. [1]
& Wikipedia:
... interactive technologies that facilitate the creation, sharing and aggregation of content (such as ideas, interests, and other forms of expression) amongst virtual communities and networks. [2]
Then, that would include HN, Discord and various online games imho. There's more about profiles / services in the Wikipedia page. That said, such definitions feel like they would also include emails / Discourse etc. Mailing lists feel like they could be considered part of "social media". Sending emails to family or close friends doesn't. So perhaps one needs to separate the platform from its various applications?
[1] https://www.google.com/search?q=social+media+definition [2] https://en.wikipedia.org/wiki/Social_media