Meaning of “update” - Learner’s Dictionary

update

verb [ T ] uk us /ʌpˈdeɪt/
INFORMATION

B1 to add new information:

We've just updated our website.
I'll update you on (= tell you about) any developments.
MODERN

B2 to make something more modern:

They need to update their image.

(Definition of “update verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)