A community contributes. Switch into it, find a reality, and enter it. The community appears under its own name.
What that looks like
A community called Animal Wellbeing finds a public reality for someone's sick dog and contributes to it. The heart-brain count rises. Animal Wellbeing appears in the list of who practiced it. If the community comments, the comment carries the community's name. For the person who created that reality, this is a different experience from receiving a contribution from one stranger. An entire community showed up.
Where a community can practice
A community can contribute to any public reality on the timeline. A community can also be invited to a private reality by whoever created it.
Why this matters for the community
Every public reality a community contributes to is a place the community becomes visible. Communities grow through practice rather than promotion.