informs, gives information (to)
Va à l'hôpital et renseigne-toi sur elle.
Go to the hospital and ask about her.
Renseigne-toi !
Do some research!
Il l'a pas vue, mais il se renseigne.
He hasn't seen her, but he's looking into it.
On se renseigne.
We're finding out.
— Piège de cristal (1988)
Renseigne-toi.
Find out.