What were the responsibilities for roman gods and goddesses?

The Romans a multitude of deities. Each of them was the deity of something specific, such as fertility, propitiation hunting the harvest, the family, women, wisdom, medicine, art, travellers, etc. There was a god or a goddess for nearly everything. The deities did not have any responsibilities. it was the Romans who had responsibilities towards the gods and goddesses. They had to perform sacrifices and other rituals in their honour.