Good communication can have a positive effect on the way anyone interacts with anyone. If we include people and update them about things that they need to know, or are interested in (of course while maintaining professional integrity), then they will be more likely to share things that we need to know, and will be more positive towards us. Even just talking about yourself and opening up a little before work or on a lunch hour can help people get to know you and getting to know each other can improve professional interaction as well.
The main job of a social care worker is to listen to the problems of the person(s) they are working with, and to come up with solutions for those problems. Being able to communicate is key to performing this job well.