My sister thinks this way. It seems like it has to do with creating projects and facilities that are positive for the community. People who promote and build community centers, literacy programs, learning activity centers for children, starting community gardens, as well as people who help build facilities in impoverished communities, etc. I think finding ways to help people feel good about themselves is important because a lot of community problems are related of course to poverty, but it's side effect of depression as well. It's hard to pull out of poverty because you feel physically sick and tired and like it's hopeless and you don't have the empowerment to change your life. Activities in community centers I think are supposed to help kids feel good at sports, have help with school, gain skill in music and art, so they feel good self-esteem and like they have the personal power to move forward in their life.
There could be this question on a personal level. I'm not always sure how to improve my own social functioning, except I've decided to focus my emotional energy towards my family to negotiate and tolerate whatever their issues are. I found that friendships were too fleeting and surface level and so family is more likely to drive you to the hospital if you are sick, so it good to be nice to these people even if they do things that are upsetting emotionally at times.