When one is asking a question related to social websites on Academia like the cases which are found by searching keywords like Facebook with almost 85 results, LinkedIn with 53 results, etc. s/he has only website option to choose a suitable tag for the question which seems to be too broad for the purpose of the social websites and is not specific enough. There are also some other tags like community or society but none of which are so relevant to those question types.
Should a social-website (or an equivalent tag) be created on the Academia and if creating this tag is reasonable, what would be a good Tag-Excerpt for it?
update and conclusion
After a few answers are posted to this question with positive vote rate; now, a tag suggestion (including the tag title, tag excerpt and tag wiki) for social-media has been posted in this answer.
Please post your suggestions and comments to that answer to improve the suggested tag title and excerpt.