This is the 15th most frequent Catalan word.
ser
"Ser" means "to be."
In this sentence, 'ser' is used to describe an inherent characteristic of the subject (he).
Ell és molt amable.
He is very kind.
Here, 'ser' introduces an abstract concept or an impersonal statement.
És important estudiar cada dia.
It is important to study every day.
In this case, 'ser' indicates the material composition of an object.