Meaning of “according to” - Learner’s Dictionary

according to

preposition uk us /əˈkɔːdɪŋtuː/
SAID BY

B1 as said by someone or shown by something:

According to Susie, he didn't even have a girlfriend.
According to our records, she was absent last Friday.
BASED ON

B2 based on a particular system or plan:

Children are allocated to schools according to the area in which they live.

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