Meaning of “importance” - Learner’s Dictionary

importance

noun [ U ] us uk /ɪmˈpɔːtəns/
We ranked the tasks in order of importance.Communication is of paramount importance.They place a lot of importance on qualifications.These problems demonstrate the importance of planning.You attach too much importance to money.

B1 how important someone or something is:

He emphasized the importance of following safety procedures.
She attaches / a lot of importance to personal possessions (= she thinks they are important).

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