What is "netizen"

1995, from net, short for Internet + citizen.

n. (context computing English) a member of the community of Internet users

The term Netizen is a portmanteau of the words Internet and citizen as in "citizen of the net". It describes a person actively involved in online communities or the Internet in general. The term commonly also implies an interest and active engagement in improving the Internet, making it an intellectual and a social resource, or its surrounding political structures, especially in regard to open access, net neutrality and free speech. Netizens are also commonly referred to as cybercitizens, which has similar connotations.
The term was widely adopted in the mid-1990s as a way to describe those who inhabit the new geography of the Internet. Internet pioneer and author Michael F. Hauben is credited with coining and popularizing the term.