Ganga is the Lunar plane on this board. The moon offers a spiritual image for receiving, reflecting and allowing an experience to unfold before responding. It sits beside the Solar plane, inviting attention to both listening and initiative.
Receptivity can be active work: hearing a difficult answer, noticing a feeling or allowing someone else to finish without taking over. It can also include recognizing when more waiting will not provide the clarity you need.
You might ask what there is to receive in your situation: information, help, another perspective or time to think. The symbolism does not claim that lunar phases determine your emotions or prescribe a physical practice.