Benefits
Give gifts like ruby the first time the community is occupied. Community provides different buff effects, for example increasing gathering speed, increase production resources, increase exp etc.
How to attack the community
To get this buff, the clan must attack the community until your clan has successfully occupied it. Cooperation of clan members is very necessary because attacking the community requires stamina.
To attack a community, clan territory must be close to the community building. Therefore, your clan must occupy the outpost around the community building