Expresses that something is not necessary to do; 'it's okay if not', 'don't have to'.
Long explanation:
The ~なくてもいい grammar point is used to express that an action or situation is not necessary or required, implying that it's okay if it does not occur. It can be translated as 'it's okay if not' or 'don't have to' in English. This grammar is used with verbs.