Knowledge about allies and enemies.
The family didn't know much about their enemies or even their allies, but when they fought them they realized they didn't know much about the primordials. Only very basic questions.
So they wanted to investigate more. The first thing they did was to read about them and ask questions. There was only very basic information about the primordials, such as their powers in general and other common issues.
There was no special information about their techniques and so on, but Knowledge had that information.
The family now that they had more confidence with this god, they were not shy to ask as much as they could.
From this they learned that each god had different strengths and weaknesses.
On the one hand, the goddess of life depended a lot on her allies and the life at her side. She was stronger the more life energy, which translated into living beings in the environment.