This is the 412th most frequent Portuguese word.
importantes
Important.
In this sentence, 'importantes' is an adjective describing the noun 'momentos', assigning the quality of being significant or meaningful.
Os momentos importantes devem ser lembrados.
The important moments should be remembered.
Here, 'importantes' qualifies the noun 'pontos', indicating key elements or main aspects.
Ela destacou os pontos importantes da apresentação.
She highlighted the important points of the presentation.
In this instance, 'importantes' modifies 'livros', suggesting they have significance or value in a learning context.