This is the 1575th most frequent Russian word.
семьям
Dative or instrumental plural form of "семья" (family) in Russian.
Here, 'семьям' is the dative plural form of 'семья', used to indicate the indirect object of the verb, meaning 'to many families'.
Мы помогли многим семьям в этой деревне.
We helped many families in this village.
In this sentence, 'семьям' is the indirect plural object of the verb 'советует', representing those receiving the advice.
Он всегда советует семьям, как лучше организовать свой быт.
He always advises families on how to better organize their household.
The word 'семьям' is in the dative case plural, indicating the recipients of the gifts distributed by the organization.