Meaning of “take sth down” - Learner’s Dictionary

take sth down

phrasal verb with take uk us /teɪk/ verb [ T ] (past tense took, past participle taken)
WRITE

to write something:

Did you take down the telephone number?
REMOVE

B2 to remove something that is on a wall or something that is temporary:

I've taken the pictures down.
We took the tent down.

(Definition of “take sth down” from the Cambridge Learner’s Dictionary © Cambridge University Press)