Convivial means of communication for content-sharing websites (6,5)

I believe the answer is:

social media

I'm a little stuck... Click here to teach me more about this clue!

'content-sharing websites' is the definition.
I can't judge whether this defines the answer.

'convivial means of communication' is the wordplay.
'convivial' becomes 'social'.
'means of communication' becomes 'media' (mass media).
'social'+'media'='SOCIAL MEDIA'

'for' is the link.

Can you help me to learn more?

(Other definitions for social media that I've seen before include "Apps used for networking" , "Popular communications channels" .)

I've seen this clue in The Irish Times.

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