This is the 446th most frequent Russian word.
людям
The word "людям" means "to people" or "for people" in English.
In this sentence, "людям" is in the dative case, indicating the indirect object, meaning "to people".
Я всегда помогаю людям.
I always help people.
Here, "людям" is also in the dative case, used to identify the recipients of the advice, translating to "to people".
Эти советы полезны людям.
These advices are helpful to people.
In this context, "людям" is in the dative case, indicating the recipients of the action of showing.