Info on online info? Facebook nowadays has a bit turning over! (8)

I believe the answer is:

metadata

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'info on online info? facebook nowadays' is the definition.
I know nothing about this answer so I can't judge whether this works.

'has a bit turning over' is the wordplay.
'has' becomes 'meta' (I am not sure about this - if you are sure you should believe this answer much more).
'bit' becomes 'tad' (both can mean a small amount).
'turning over' is a reversal indicator.
'a'+'tad'='atad'
'atad' reversed gives 'data'.
'meta'+'data'='METADATA'

Can you help me to learn more?

(Another definition for metadata that I've seen is " computer storage information".)

I've seen this clue in The Independent.

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