Community service involves social work carried out in groups with specific goals and purposes. It focuses on projects that help clean and beautify areas like schools, recreational areas, cemeteries, and community halls. Community service at places like orphanages and old folks' homes is also mentioned. Community service is important as it improves knowledge and skills for solving community problems, nurtures a sense of togetherness, helps develop cooperation and helping others, and inculcates living together regardless of differences. The document discusses tribal, rural, and urban communities and notes key differences like dependencies, population densities, relationships, and ways of life.