This is the 842nd most frequent Finnish word.
ihmisille
"To people" or "for people."
In this sentence, 'ihmisille' is used in the allative case to signify giving something to people.
Annan lahjoja ihmisille jouluna.
I give gifts to people at Christmas.
Here 'ihmisille' identifies the audience intended for the following statement.
Ihmisille, jotka rakastavat musiikkia, tämä konsertti on täydellinen.
For people who love music, this concert is perfect.
This usage of 'ihmisille' implies the general significance of the concept to people.