Many cultures present monogamy as the only morally correct relationship model, but many of us don't fit into those constraints. This causes us to feel like there's something wrong with us, that we just aren't good at relationships, where in reality we just didn't know there were other options—the ones where having feelings for other people isn't just allowed, but we also get to act on them.
Polyamory is a relationship model where we're allowed to have and love multiple partners simultaneously, with the enthusiastic consent of everyone involved. Polyamorous relationships are tricky for a number of reasons, which is why it's useful to have a community and a safe space where we can share our experiences without receiving blank stares and people telling us that we just haven't found The One. This way we can help each other create and maintain ethical polyamorous relationships.
I only ask you to follow these two rules:
1. Do not talk about other members outside the group. Outing people can lead to serious consequences for them, many polyamorous people can't afford to be out to everyone in their lives.
2. All ethical alternatives to monogamy, as well as monogamy itself, are welcome. Do not try to convert people to your preferred relationship model.